AS1334-BTDT

AS1334-BTDT Datasheet

AS1334

Part	Datasheet
AS1334-BTDT	AS1334-BTDT (pdf)

Related Parts	Information
AS1334-BTDT-30	AS1334-BTDT-30
AS1334-SAMPLE	AS1334-SAMPLE

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 Datasheet AS1334 650mA, Ultra low Ripple Step Down DC/DC Converter 1 General Description 2 Key Features The AS1334 is a step-down DC-DC converter designed to power portable applications from a single Li-Ion battery. The device also achieves high-performance in mobile phones and other applications requiring low dropout voltage. lid The AS1334 operates from an input voltage range of to 5.5V while providing output voltages of and 3.3V. Fixed-frequency PWM operation minimizes RF interference. a Shutdown function turns the device off and reduces battery consumption to 0.01µA typ . v The AS1334 is available in a TDFN 3x3 8-pin package. A high ill switching frequency 2 MHz allows use of tiny surface-mount components. Only three small external surface-mount components, AG t st an inductor and two ceramic capacitors are required. Output Voltage Ripple 2mV PWM Switching Frequency 2MHz Single Lithium-Ion Cell Operation Output Voltage Range 1.2V to 3.4V available in 100mV steps, see Ordering Information on page 17 Fixed Output Voltages - 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V Maximum Load Capability of 650mA 97% High Efficiency, 94% Average Efficiency Current Overload Protection Thermal Overload Protection Power-OK Soft Start Low Dropout Voltage 140 mΩ Typ PFET TDFN 3x3 8-pin ams 3 nApptliecatinons Figure AS1334 - Typical Application Circuit The AS1334 is an ideal solution to supply noise sensitive applications as cellular phones, hand-held radios, RF PC cards, battery powered RF devices, RFID chipsets, A/D Converter, Sensors and OpAmps. al co VIN ic 10 µF PVIN VDD hn ON Tec OFF AS1334 SW µH 10 µF POK VOUT PGND SGND 1 - 18 AS1334 Datasheet - Pin Assignments 4 Pin Assignments Figure Pin Configuration lid FB 1 POK 2 a EN 3 v VDD 4 8 PGND AS1334 SGND 9 7 SW 6 PVIN 5 SGND s AGent still PinDescriptions m t Table Pin Descriptions Pin Number Pin Name FB SGND PVIN Techn 8 PGND Description Feedback Pin. Connect to the output at the output filter capacitor. Power-OK. 0 = VOUT < 90% of VOUTNOM. 1 = VOUT > 90% of VOUTNOM. Enable Input. Set this digital input high for normal operation. For shutdown, set low. +2.7V to +5.5V Power Supply Voltage. Analog Supply Input. Analog and Control Ground. Connect these pins with low resistance to PGND. +2.7V to +5.5V Power Supply Voltage. Input to the internal PFET switch. Switch Pin. Switch node connection to the internal PFET switch and NFET synchronous rectifier. Connect to an inductor with a saturation current rating that exceeds the maximum switch peak current limit specification of the AS1334. Power Ground. Connect this pin with low resistance to SGND. 2 - 18 AS1334 Datasheet - Absolute Maximum Ratings 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table Absolute Maximum Ratings Datasheet - Ordering Information 11 Ordering Information The device is available as the standard products shown in Table Table Ordering Information Ordering Code Marking Output Delivery Form Package AS1334-BTDT-12 AS1334-BTDT-15 lid AS1334-BTDT-18 AS1334-BTDT-25 a AS1334-BTDT-30 v AS1334-BTDT-33 ill AS1334-BTDT-xx1 ASR2 ASR3 ASR4 ASR5 ASQY ASR6 xxxx 1.2V 650mA, Ultra low Ripple Step Down DC/DC Converter Tape and Reel TDFN 3x3 8-pin 1.5V 650mA, Ultra low Ripple Step Down DC/DC Converter Tape and Reel TDFN 3x3 8-pin 1.8V 650mA, Ultra low Ripple Step Down DC/DC Converter Tape and Reel TDFN 3x3 8-pin 2.5V 650mA, Ultra low Ripple Step Down DC/DC Converter Tape and Reel TDFN 3x3 8-pin 3.0V 650mA, Ultra low Ripple Step Down DC/DC Converter Tape and Reel TDFN 3x3 8-pin 3.3V 650mA, Ultra low Ripple Step Down DC/DC Converter Tape and Reel TDFN 3x3 8-pin xxxx 650mA, Ultra low Ripple Step Down DC/DC Converter Tape and Reel TDFN 3x3 8-pin t Non-standard devices are available between 1.2V and 3.4V in 100mV steps. For more information and inquiries contact G s Note All products are RoHS compliant. A t Buy our products or get free samples online at ICdirect: s n Technical Support is found at e For further information and requests, please contact us m t or find your local distributor at

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

Datasheet

AS1334
650mA, Ultra low Ripple Step Down DC/DC Converter
1 General Description
2 Key Features

The AS1334 is a step-down DC-DC converter designed to power portable applications from a single Li-Ion battery. The device also achieves high-performance in mobile phones and other applications requiring low dropout voltage.
lid The AS1334 operates from an input voltage range of to 5.5V
while providing output voltages of and 3.3V.

Fixed-frequency PWM operation minimizes RF interference.
a Shutdown function turns the device off and reduces battery
consumption to 0.01µA typ .
v The AS1334 is available in a TDFN 3x3 8-pin package. A high ill switching frequency 2 MHz allows use of tiny surface-mount
components. Only three small external surface-mount components,

AG t st an inductor and two ceramic capacitors are required.
Output Voltage Ripple 2mV PWM Switching Frequency 2MHz Single Lithium-Ion Cell Operation Output Voltage Range 1.2V to 3.4V available in 100mV steps, see Ordering Information on page 17 Fixed Output Voltages - 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V Maximum Load Capability of 650mA 97% High Efficiency, 94% Average Efficiency Current Overload Protection Thermal Overload Protection Power-OK Soft Start Low Dropout Voltage 140 mΩ Typ PFET TDFN 3x3 8-pin
ams 3 nApptliecatinons Figure AS1334 - Typical Application Circuit

The AS1334 is an ideal solution to supply noise sensitive applications as cellular phones, hand-held radios, RF PC cards, battery powered RF devices, RFID chipsets, A/D Converter, Sensors and OpAmps.
al co VIN ic 10 µF

PVIN VDD
hn ON

Tec OFF

AS1334

SW µH
10 µF POK

VOUT

PGND

SGND
1 - 18

AS1334

Datasheet - Pin Assignments
4 Pin Assignments

Figure Pin Configuration
lid FB 1

POK 2
a EN 3 v VDD 4
8 PGND

AS1334

SGND 9
7 SW 6 PVIN 5 SGND
s AGent still PinDescriptions
m t Table Pin Descriptions

Pin Number

Pin Name FB

SGND

PVIN

Techn 8

PGND

Description Feedback Pin. Connect to the output at the output filter capacitor. Power-OK. 0 = VOUT < 90% of VOUTNOM. 1 = VOUT > 90% of VOUTNOM. Enable Input. Set this digital input high for normal operation. For shutdown, set low. +2.7V to +5.5V Power Supply Voltage. Analog Supply Input.

Analog and Control Ground. Connect these pins with low resistance to PGND. +2.7V to +5.5V Power Supply Voltage. Input to the internal PFET switch. Switch Pin. Switch node connection to the internal PFET switch and NFET synchronous rectifier. Connect to an inductor with a saturation current rating that exceeds the maximum switch peak current limit specification of the AS1334. Power Ground. Connect this pin with low resistance to SGND.
2 - 18

AS1334

Datasheet - Absolute Maximum Ratings
5 Absolute Maximum Ratings

Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Table Absolute Maximum Ratings
Datasheet - Ordering Information
11 Ordering Information

The device is available as the standard products shown in Table
Table Ordering Information
Ordering Code

Marking Output

Delivery Form

Package

AS1334-BTDT-12 AS1334-BTDT-15
lid AS1334-BTDT-18

AS1334-BTDT-25
a AS1334-BTDT-30 v AS1334-BTDT-33 ill AS1334-BTDT-xx1

ASR2 ASR3 ASR4 ASR5 ASQY ASR6 xxxx
1.2V
650mA, Ultra low Ripple Step Down DC/DC Converter

Tape and Reel

TDFN 3x3 8-pin
1.5V
650mA, Ultra low Ripple Step Down DC/DC Converter

Tape and Reel

TDFN 3x3 8-pin
1.8V
650mA, Ultra low Ripple Step Down DC/DC Converter

Tape and Reel

TDFN 3x3 8-pin
2.5V
650mA, Ultra low Ripple Step Down DC/DC Converter

Tape and Reel

TDFN 3x3 8-pin
3.0V
650mA, Ultra low Ripple Step Down DC/DC Converter

Tape and Reel

TDFN 3x3 8-pin
3.3V
650mA, Ultra low Ripple Step Down DC/DC Converter

Tape and Reel

TDFN 3x3 8-pin
xxxx
650mA, Ultra low Ripple Step Down DC/DC Converter

Tape and Reel

TDFN 3x3 8-pin
t Non-standard devices are available between 1.2V and 3.4V in 100mV steps. For more information and inquiries contact

G s Note All products are RoHS compliant. A t Buy our products or get free samples online at ICdirect:
s n Technical Support is found at
e For further information and requests, please contact us m t or find your local distributor at

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS1334-BTDT Datasheet file may be downloaded here without warranties.

Datasheet ID: AS1334-BTDT 519596