AS1356-15-T

AS1356-15-T Datasheet

AS1353, AS1356

Part	Datasheet
AS1356-15-T	AS1356-15-T (pdf)

Related Parts	Information
AS1353-18-T	AS1353-18-T
AS1356-36-T	AS1356-36-T
AS1356-25-T	AS1356-25-T
AS1356-27-T	AS1356-27-T
AS1356-18-T	AS1356-18-T
AS1356-30-T	AS1356-30-T
AS1353-36-T	AS1353-36-T
AS1353-28-T	AS1353-28-T
AS1356-33-T	AS1356-33-T
AS1353-30-T	AS1353-30-T
AS1353-15-T	AS1353-15-T
AS1353-26-T	AS1353-26-T
AS1353-33-T	AS1353-33-T

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austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 e-Mail: Please visit our website at AS1353, AS1356 Linear Low-Dropout 150mA Voltage Regulators Data Sheet 1 General Description 2 Key Features The AS1353/AS1356 are high-performance, fixed-voltage linear LDOs designed for use with capacitors of 1 to 10µF. The devices can deliver superior performance even under low dropout conditions when the power tran- lid sistor operates in linear mode. The integrated P-channel MOSFET output allows the devices to maintain a low supply-current at loads of up a to150mA. A shutdown mode includes logic-controlled circuitry which reduces shutdown current to less than v 1µA max . Integrated over-temperature and over-current protec- ill tion circuitry switches the devices off in case of thermal overload or output short-circuit conditions. t The AS1353/AS1356 are optimized for low equivalent- series resistance ESR output capacitors. Additionally, connects the internal circuitry and parasitic diodes if the battery is connected incorrectly. A t The AS1356 also features power-OK circuitry which can s n be used to monitor output regulation. All devices also feature an integrated error amplifier and e built-in 1.25V reference, and output current is limited m t 380mA typ via the on-chip current limiting circuitry. Multiple output voltages are available as standard prod- a 3nApplications ucts or 1.5V. All devices are avail- able in a 5-pin SOT23 package. l co Figure Pinout and Application Diagrams The devices are ideal for powering cordless and mobile phones, MP3 players, CD and DVD players, PDAs, handheld computers, digital cameras, and any other hand-held and/or battery-powered device. a IN 1 ic GND 2 5 OUT AS1353 n SHDNM 3 +5.5V cCIN 1µF TeOn AS1353 SHDNM Preset Output to 3.6V, The AS1353/AS1356 are low-dropout, low-quiescent-current linear regulators intended for LDO regulator applications where output current load requirements range from no load to 150mA. All devices come standard with fixed output voltages of to 3.6V see Ordering Information on page Figure Block Diagram lid IN SHDNM ill va BP1 AG t st GND Thermal Overload Protection Shutdown/ Power-On Control Logic Bandgap Voltage & Current Reference Trimmable Reference Voltage AS1353/AS1356 Error Amplifier + AS1356 only OUT POK 2 1 AS1353 only 2 AS1356 only and shutdown logic. a n The 1.25V bandgap reference is connected to the inverting input of the error amplifier. The error amplifier compares this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the refer- o ence voltage, the P-channel MOSFET gate is pulled lower, allowing more current to pass to the output, and increases the output voltage. If the feedback voltage is too high, the pass-transistor gate is pulled up, allowing less current to c pass to the output. The output voltage feeds back through an internal resistor voltage divider connected to pin OUT. l Output Voltages Standard products are factory-set with output voltages of from to 3.6V. A two-digit suffix of the part number identi- a fies the nominal output voltage see Ordering Information on page ic Non-standard devices are available. Contact austriamicrosystems AG for more information. Internal P-Channel MOSFET Pass Transistor n The integrated typ P-channel MOSFET pass transistor requires no base drive, which reduces quiescent current significantly, and does not exhibit the problems associated with PNP-based regulators, such as dropout when the pass h transistor saturates or high base-drive currents under large load conditions. The devices consume only 115µA quiescent current in dropout, light-load, or heavy-load applications see Typical c Operating Characteristics on page e Power-OK TThe AS1356’s power-ok circuitry is built around an N-channel MOSFET. The circuitry monitors the voltage on pin 5 OUT and if the voltage goes out of regulation e.g. during dropout, current limit, or thermal shutdown pin POK goes low. 8 - 13 AS1353/AS1356 Data Sheet - Detailed Description The power-OK feature is not active during shutdown and provides a power-on-reset POR function that can operate down to VIN = 1V. A capacitor to GND may be added to generate a POR delay. To obtain a logic-level output, connect a pull-up resistor from pin POK to pin OUT. Larger values for this resistor will help minimize current consumption a 100kΩ resistor is perfect for most applications see Figure Current Limiting The AS1353/AS1356 include current limiting circuitry to protect against short-circuit conditions. The circuitry monitors a and controls the gate voltage of the P-channel MOSFET, limiting the output current to 380mA typ . The P-channel MOSFET output can be shorted to ground for an indefinite period of time without damaging the device. ill v Noise Reduction The AS1353 uses an external 0.01µF bypass capacitor CBP at pin BP to reduce output noise. An internal pre-charge circuit is used to reduce start-up time. t The use of CBP > 0.01µF improves noise performances but increases start-up time. G s Thermal-Overload Protection A t The devices are protected against thermal runaway conditions by the integrated thermal sensor circuitry. Thermal shutdown is an effective means to prevent die overheating since the power transistor is the principle heat source in the s n device. If the junction temperature exceeds 165ºC typ, AS1356 or 150ºC typ, AS1353 , the thermal sensor starts the shut- e down logic, at which point the P-channel MOSFET is switched off. After the device temperature has dropped by m t approximately 20ºC, the thermal sensor will turn the P-channel MOSFET on again. Note that this will be exhibited as a pulsed output under continuous thermal-overload conditions. a n Note The absolute maximum junction-temperature rating of +150ºC should not be exceeding during continual operation. co Operating Region and Power Dissipation Maximum power dissipation is determined by the thermal resistance of the case and circuit board, the temperature dif- l ference between the die junction and ambient air, and the rate of air flow. The power dissipation of the device is calcu- lated by: aP = IOUT VIN - VOUT ic Maximum power dissipation is calculated by: PMAX = TJ - TAMB / ΘJB + ΘJA n Where h TJ - TAMB is the temperature difference between the device die junction and the surrounding air. ΘJB or ΘJC is the thermal resistance of the package. c ΘJA is the thermal resistance through the printed circuit board, copper traces, and other materials to the surrounding e air. TNote Pin GND is a multi-function pin providing a connection to the system ground and acting as a heat sink. This pin should be connected to the system ground using a large pad or ground plane. 9 - 13 AS1353/AS1356 Data Sheet - Typical Application 9 Typical Application AS1353/AS1356 Data Sheet - Ordering Information 11 Ordering Information The devices are available as the following standard products. Type Marking Delivery Form Package Tape and Reel 5-pin SOT23 AS1353-18-T AS1353-26-T AS1353-28-T lid AS1353-30-T AS1353-33-T AS1353-36-T ASD9 ASHB ASHC ASHD ASHE ASI8 va AS1356-27-T ASHM ill AS1356-33-T ASHO Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel 5-pin SOT23 5-pin SOT23 5-pin SOT23 5-pin SOT23 5-pin SOT23 5-pin SOT23 Tape and Reel Tape and Reel 5-pin SOT23 5-pin SOT23 t Non-standard versions are available with a minimum order of 30,000 units. Contact austriamicrosystems for availability Technicaaml scoAnGtent s ofnon-standardversions. 12 - 13 AS1353/AS1356 Data Sheet Copyrights Copyright 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer lid Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior a to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. v This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life- ill sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. t The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, G austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to s personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or A t consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the tech- nical data herein. No obligation or liability to recipient or any third party shall arise or flow out of s n austriamicrosystems AG rendering of technical or other services. nicaaml conte Contact Information h Headquarters austriamicrosystems AG c A-8141 Schloss Premstaetten, Austria e Tel +43 0 3136 500 0 TFax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 13 - 13

PDF Datasheet Preview

austriamicrosystems AG is now
ams AG

The technical content of this austriamicrosystems datasheet is still valid.

Contact information Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 e-Mail:

Please visit our website at

AS1353, AS1356

Linear Low-Dropout 150mA Voltage Regulators

Data Sheet
1 General Description
2 Key Features

The AS1353/AS1356 are high-performance, fixed-voltage linear LDOs designed for use with capacitors of 1 to 10µF. The devices can deliver superior performance even under low dropout conditions when the power tran-
lid sistor operates in linear mode.

The integrated P-channel MOSFET output allows the devices to maintain a low supply-current at loads of up
a to150mA. A shutdown mode includes logic-controlled
circuitry which reduces shutdown current to less than
v 1µA max .

Integrated over-temperature and over-current protec-
ill tion circuitry switches the devices off in case of thermal
overload or output short-circuit conditions.
t The AS1353/AS1356 are optimized for low equivalent-
series resistance ESR output capacitors. Additionally,
connects the internal circuitry and parasitic diodes if the battery is connected incorrectly.

A t The AS1356 also features power-OK circuitry which can s n be used to monitor output regulation.

All devices also feature an integrated error amplifier and
e built-in 1.25V reference, and output current is limited m t 380mA typ via the on-chip current limiting circuitry.

Multiple output voltages are available as standard prod-
a 3nApplications ucts or 1.5V. All devices are avail-
able in a 5-pin SOT23 package.
l co Figure Pinout and Application Diagrams

The devices are ideal for powering cordless and mobile phones, MP3 players, CD and DVD players, PDAs, handheld computers, digital cameras, and any other hand-held and/or battery-powered device.
a IN 1 ic GND 2
5 OUT

AS1353
n SHDNM 3
+5.5V
cCIN
1µF

TeOn

AS1353

SHDNM

Preset Output to 3.6V,
The AS1353/AS1356 are low-dropout, low-quiescent-current linear regulators intended for LDO regulator applications where output current load requirements range from no load to 150mA. All devices come standard with fixed output voltages of to 3.6V see Ordering Information on page

Figure Block Diagram
lid IN

SHDNM
ill va BP1 AG t st GND

Thermal Overload Protection

Shutdown/ Power-On Control Logic

Bandgap Voltage &

Current Reference

Trimmable Reference

Voltage

AS1353/AS1356

Error

Amplifier +

AS1356 only

OUT POK 2 1 AS1353 only 2 AS1356 only
and shutdown logic.
a n The 1.25V bandgap reference is connected to the inverting input of the error amplifier. The error amplifier compares
this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the refer-
o ence voltage, the P-channel MOSFET gate is pulled lower, allowing more current to pass to the output, and increases
the output voltage. If the feedback voltage is too high, the pass-transistor gate is pulled up, allowing less current to
c pass to the output. The output voltage feeds back through an internal resistor voltage divider connected to pin OUT. l Output Voltages

Standard products are factory-set with output voltages of from to 3.6V. A two-digit suffix of the part number identi-
a fies the nominal output voltage see Ordering Information on page ic Non-standard devices are available. Contact austriamicrosystems AG for more information.

Internal P-Channel MOSFET Pass Transistor
n The integrated typ P-channel MOSFET pass transistor requires no base drive, which reduces quiescent current
significantly, and does not exhibit the problems associated with PNP-based regulators, such as dropout when the pass
h transistor saturates or high base-drive currents under large load conditions.

The devices consume only 115µA quiescent current in dropout, light-load, or heavy-load applications see Typical
c Operating Characteristics on page e Power-OK TThe AS1356’s power-ok circuitry is built around an N-channel MOSFET. The circuitry monitors the voltage on pin 5

OUT and if the voltage goes out of regulation e.g. during dropout, current limit, or thermal shutdown pin POK goes
low.
8 - 13

AS1353/AS1356 Data Sheet - Detailed Description

The power-OK feature is not active during shutdown and provides a power-on-reset POR function that can operate down to VIN = 1V. A capacitor to GND may be added to generate a POR delay.

To obtain a logic-level output, connect a pull-up resistor from pin POK to pin OUT. Larger values for this resistor will help minimize current consumption a 100kΩ resistor is perfect for most applications see Figure

Current Limiting

The AS1353/AS1356 include current limiting circuitry to protect against short-circuit conditions. The circuitry monitors
a and controls the gate voltage of the P-channel MOSFET, limiting the output current to 380mA typ . The P-channel

MOSFET output can be shorted to ground for an indefinite period of time without damaging the device.
ill v Noise Reduction

The AS1353 uses an external 0.01µF bypass capacitor CBP at pin BP to reduce output noise. An internal pre-charge circuit is used to reduce start-up time.
t The use of CBP > 0.01µF improves noise performances but increases start-up time.

G s Thermal-Overload Protection A t The devices are protected against thermal runaway conditions by the integrated thermal sensor circuitry. Thermal
shutdown is an effective means to prevent die overheating since the power transistor is the principle heat source in the
s n device.

If the junction temperature exceeds 165ºC typ, AS1356 or 150ºC typ, AS1353 , the thermal sensor starts the shut-
e down logic, at which point the P-channel MOSFET is switched off. After the device temperature has dropped by m t approximately 20ºC, the thermal sensor will turn the P-channel MOSFET on again. Note that this will be exhibited as a
pulsed output under continuous thermal-overload conditions.
a n Note The absolute maximum junction-temperature rating of +150ºC should not be exceeding during continual operation.
co Operating Region and Power Dissipation

Maximum power dissipation is determined by the thermal resistance of the case and circuit board, the temperature dif-
l ference between the die junction and ambient air, and the rate of air flow. The power dissipation of the device is calcu-
lated by:
aP = IOUT VIN - VOUT ic Maximum power dissipation is calculated by:

PMAX = TJ - TAMB / ΘJB + ΘJA
n Where h TJ - TAMB is the temperature difference between the device die junction and the surrounding air.
ΘJB or ΘJC is the thermal resistance of the package.
c ΘJA is the thermal resistance through the printed circuit board, copper traces, and other materials to the surrounding e air.

TNote Pin GND is a multi-function pin providing a connection to the system ground and acting as a heat sink. This pin
should be connected to the system ground using a large pad or ground plane.
9 - 13

AS1353/AS1356 Data Sheet - Typical Application
9 Typical Application
AS1353/AS1356 Data Sheet - Ordering Information
11 Ordering Information

The devices are available as the following standard products.

Type

Marking

Delivery Form

Package

Tape and Reel 5-pin SOT23

AS1353-18-T AS1353-26-T AS1353-28-T
lid AS1353-30-T

AS1353-33-T AS1353-36-T

ASD9 ASHB ASHC ASHD ASHE ASI8
va AS1356-27-T ASHM ill AS1356-33-T ASHO

Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel
5-pin SOT23 5-pin SOT23 5-pin SOT23 5-pin SOT23 5-pin SOT23 5-pin SOT23

Tape and Reel Tape and Reel
5-pin SOT23 5-pin SOT23
t Non-standard versions are available with a minimum order of 30,000 units. Contact austriamicrosystems for availability Technicaaml scoAnGtent s ofnon-standardversions.
12 - 13

AS1353/AS1356 Data Sheet

Copyrights

Copyright 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer
lid Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing
in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior
a to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. v This product is intended for use in normal commercial applications. Applications requiring extended temperature
range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-
ill sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for
each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location.
t The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, G austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to s personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or A t consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the tech-
nical data herein. No obligation or liability to recipient or any third party shall arise or flow out of
s n austriamicrosystems AG rendering of technical or other services. nicaaml conte Contact Information h Headquarters
austriamicrosystems AG
c A-8141 Schloss Premstaetten, Austria e Tel +43 0 3136 500 0 TFax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
13 - 13

More datasheets: STS110003CHIP | B59811C0135A070 | B59841C0135A070 | B59881C0135A070 | B59891C0135A070 | B59871C0135A070 | EA-XPR-006 | AS1353-18-T | AS1356-36-T | AS1356-25-T

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Datasheet ID: AS1356-15-T 519614