MIC24085FYML-TX

MIC24085FYML-TX Datasheet

MIC24085

Part	Datasheet
MIC24085FYML-TX	MIC24085FYML-TX (pdf)

Related Parts	Information
MIC24085AYML-TR	MIC24085AYML-TR
MIC24085BYML-TX	MIC24085BYML-TX
MIC24085DYML-TX	MIC24085DYML-TX
MIC24085AYML-TX	MIC24085AYML-TX
MIC24085DYML TR	MIC24085DYML TR
MIC24085CYML-TX	MIC24085CYML-TX
MIC24085CYML TR	MIC24085CYML TR
MIC24085BYML TR	MIC24085BYML TR
MIC24085EYML-TX	MIC24085EYML-TX
MIC24085AYML-EV	MIC24085AYML-EV

PDF Datasheet Preview
MIC24085 18V, 3A, 1MHz, High-Performance, Integrated FET Buck Regulator in Tiny 3mm x 3mm QFN Micrel’s MIC24085 is a constant-frequency, current-mode PWM buck regulator with integrated switchers. The MIC24085 is targeted for cost-sensitive and highperformance applications. The MIC24085 operates over a supply range of 4.5V to 18V at a fixed 1MHz switching frequency and can be used to provide up to 3A of output current. The output voltage is adjustable down to 0.9V. The MIC24085 provides the features of low standby current at 10µA, device enable, input undervoltage lockout, and output voltage monitoring. The part also provides fault protections of overcurrent and overtemperature. The MIC24085 is available in a 16-pin 3mm x 3mm QFN package with a junction operating range from to +125°C. Datasheets and support documentation are available on Micrel’s web site at: • Input voltage range 4.5V to 18V • 3A output current • 1MHz switching frequency • 0.9V reference voltage with accuracy • Fixed output voltages are available at: 1.5V/1.8V/2.5V/3.3V/5V • Peak current-mode PWM with internal compensation • PFM mode for light load efficiency • 10µA typical shutdown current • 4ms internal soft start • Cycle-by-cycle current limit with frequency foldback • Output overvoltage protection • Enable input/power-good PG output • Thermal-shutdown protection • to +125°C junction temperature range • Available in 16-pin 3mm x 3mm QFN package • Camera, set-top box, gateways, and routers • Networking/telecom infrastructure • Printers, scanners, graphic cards, and video cards Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 408 944-0800 • fax + 1 408 474-1000 • October 22, 2013 Micrel, Inc. Ordering Information Part Number MIC24085AYML MIC24085BYML MIC24085CYML MIC24085DYML MIC24085EYML MIC24085FYML Output Voltage ADJ 1.5V 1.8V 2.5V 3.3V 5V Pin Configuration Junction Temperature Range to +125°C Package MIC24085 Lead Finish 16-Pin 3mm x 3mm QFN Pb-Free 16-Pin 3mm x 3mm QFN ML Top View Pin Description Pin Number 1, 12, 13, 16 Pin Name SW 2, 3, 11 14,15 EP PGND ePAD Pin Function Switch Node Output Power stage output. Connect an inductor to this pin. Supply Voltage for control circuit and power stage A ceramic input capacitor between VCC and the power ground PGND is required. Analog Ground GND is the ground path of the control circuitry. Feedback Input to the error amplifier of the PWM controller. The FB pin is regulated to 0.9V. A resistor divider connecting the feedback to the output is used to adjust the desired output voltage. No connection. Power Good Output Open drain output, which needs a pull-up. The PG pin turns logic high when the converter output voltage is regulated in the range from 93% to 103% of the setting. Enable Input An accurate Enable with hysteresis is provided. High = enable, Low = shutdown. Enable has an internal pull-up to ensure a stable state if this pin is not connected. Boost Output Bootstrapped voltage to the high-side N-channel MOSFET. A boost capacitor of 0.1uF is connected between the BST pin and the SW pin. Power Ground PGND is the ground path for the power stage. Exposed Pad. It must be connected to PGND on the PCB. October 22, 2013 Micrel, Inc. MIC24085 Absolute Maximum Ratings 1 VVCC to −0.3V to +20V VSW to −0.3V to +20V VEN, VFB, VPG, to GND −0.3V to + 6V VBST to VSW −0.3V to + 6V VBST to PGND −0.3V to +26V PGND to GND −0.3V to + 0.3V Junction Temperature +150°C Storage Temperature TS ......................... −65°C to +150°C Lead Temperature soldering, 10sec 260°C ESD 2kV Operating Ratings 2 Supply Voltage VVCC 4.5V to 18V Output Current 3A Junction Temperature TJ −40°C to +125°C Junction Thermal Resistance MLF-16 68°C/W MLF-16 7.5°C/W Electrical Characteristics 4 VVCC = 12V TA = 25°C, unless noted. Bold values indicate −40°C TJ +125°C. Parameter Condition Min. Typ.

PDF Datasheet Preview

MIC24085
18V, 3A, 1MHz, High-Performance, Integrated FET Buck Regulator in Tiny 3mm x 3mm QFN

Micrel’s MIC24085 is a constant-frequency, current-mode PWM buck regulator with integrated switchers. The MIC24085 is targeted for cost-sensitive and highperformance applications.

The MIC24085 operates over a supply range of 4.5V to 18V at a fixed 1MHz switching frequency and can be used to provide up to 3A of output current. The output voltage is adjustable down to 0.9V.

The MIC24085 provides the features of low standby current at 10µA, device enable, input undervoltage lockout, and output voltage monitoring. The part also provides fault protections of overcurrent and overtemperature.

The MIC24085 is available in a 16-pin 3mm x 3mm QFN package with a junction operating range from to +125°C.

Datasheets and support documentation are available on Micrel’s web site at:
• Input voltage range 4.5V to 18V
• 3A output current
• 1MHz switching frequency
• 0.9V reference voltage with accuracy
• Fixed output voltages are available at:
1.5V/1.8V/2.5V/3.3V/5V
• Peak current-mode PWM with internal compensation
• PFM mode for light load efficiency
• 10µA typical shutdown current
• 4ms internal soft start
• Cycle-by-cycle current limit with frequency foldback
• Output overvoltage protection
• Enable input/power-good PG output
• Thermal-shutdown protection
• to +125°C junction temperature range
• Available in 16-pin 3mm x 3mm QFN package
• Camera, set-top box, gateways, and routers
• Networking/telecom infrastructure
• Printers, scanners, graphic cards, and video cards

Micrel Inc.
• 2180 Fortune Drive
• San Jose, CA 95131
• USA
• tel +1 408 944-0800
• fax + 1 408 474-1000
•

October 22, 2013

Micrel, Inc.
Ordering Information

Part Number MIC24085AYML MIC24085BYML MIC24085CYML MIC24085DYML MIC24085EYML MIC24085FYML

Output Voltage ADJ 1.5V 1.8V 2.5V 3.3V 5V

Pin Configuration

Junction Temperature Range to +125°C

Package

MIC24085 Lead Finish
16-Pin 3mm x 3mm QFN

Pb-Free
16-Pin 3mm x 3mm QFN ML Top View

Pin Description

Pin Number 1, 12, 13, 16

Pin Name SW
2, 3, 11
14,15 EP

PGND ePAD

Pin Function

Switch Node Output Power stage output. Connect an inductor to this pin.

Supply Voltage for control circuit and power stage A ceramic input capacitor between VCC and the power ground PGND is required.

Analog Ground GND is the ground path of the control circuitry.

Feedback Input to the error amplifier of the PWM controller. The FB pin is regulated to 0.9V. A resistor divider connecting the feedback to the output is used to adjust the desired output voltage.

No connection.

Power Good Output Open drain output, which needs a pull-up. The PG pin turns logic high when the converter output voltage is regulated in the range from 93% to 103% of the setting.

Enable Input An accurate Enable with hysteresis is provided. High = enable, Low = shutdown. Enable has an internal pull-up to ensure a stable state if this pin is not connected.

Boost Output Bootstrapped voltage to the high-side N-channel MOSFET. A boost capacitor of 0.1uF is connected between the BST pin and the SW pin.

Power Ground PGND is the ground path for the power stage.

Exposed Pad. It must be connected to PGND on the PCB.

October 22, 2013

Micrel, Inc.

MIC24085

Absolute Maximum Ratings 1

VVCC to −0.3V to +20V VSW to −0.3V to +20V VEN, VFB, VPG, to GND −0.3V to + 6V VBST to VSW −0.3V to + 6V VBST to PGND −0.3V to +26V PGND to GND −0.3V to + 0.3V Junction Temperature +150°C Storage Temperature TS ......................... −65°C to +150°C Lead Temperature soldering, 10sec 260°C ESD 2kV

Operating Ratings 2

Supply Voltage VVCC 4.5V to 18V Output Current 3A Junction Temperature TJ −40°C to +125°C Junction Thermal Resistance

MLF-16 68°C/W MLF-16 7.5°C/W

Electrical Characteristics 4

VVCC = 12V TA = 25°C, unless noted. Bold values indicate −40°C TJ +125°C.

Parameter

Condition

Min.

Typ.

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Datasheet ID: MIC24085FYML-TX 647893