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IR3895MTR1PBF

- 1 -P 16A Highly Integrated SupIRBuck Single‐Input Voltage, Synchronous Buck Regulator

International Rectifier 

16A Highly Integrated SupIRBuck

Single‐Input V-o6lt-aPge, Synchronous Buck Regulator

PD‐97746

IR3895

ELECTRICAL SPECIFICATIONS

RECOMMENDED OPERATING CONDITIONS FOR RELIABLE OPERATION WITH MARGIN

Input Voltage Range*

Input Voltage Range**

Supply Voltage Range***

Supply Voltage Range

Output Voltage Range

Output Current Range

Switching Frequency

Operating Junction Temperature

SYMBOL

PVin

Vin

VCC

Boot to SW

VO

IO

FS

TJ

MIN

1.0

5

4.5

4.5

0.5

0

300

‐40

MAX

21

21

7.5

7.5

0.86xVin

±16

1500

125

UNITS

V

A

kHz

°C

*Maximum SW node voltage should not exceed 25V.

**For internally biased single rail operation. When Vin drops below 6.8V, the internal LDO enters dropout. Please refer to Smart LDO

section and Over Current Protection for detailed application information.

*** Vcc/LDO_out can be connected to an external regulated supply. If so, the Vin input should be connected to Vcc/LDO_out pin.

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, these specifications apply over, 6.8V < Vin = PVin < 21V, Vref = 0.5V in 0°C < TJ < 125°C.

Typical values are specified at Ta = 25°C.

PARAMETER

Power Stage

Power Losses

Top Switch

Bottom Switch

Bootstrap Diode Forward

Voltage

SW Leakage Current

Dead Band Time

Supply Current

Vin Supply Current (standby)

Vin Supply Current (dynamic)

VCC LDO Output

Output Voltage

VCC Dropout

Short Circuit Current

SYMBOL

CONDITIONS

MIN TYP MAX UNIT

PLOSS

Rds(on)_Top

Rds(on)_Bot

ISW

Tdb

Vin = 12V, VO = 1.2V, IO = 16A,

Fs = 600kHz, L = 0.4uH,

Vcc = 6.4V (internal LDO), Note 4

VBoot ‐ Vsw= 6.4V, IO = 16A, Tj =25°C

Vcc = 6.4V, IO = 16A, Tj =25°C

I(Boot) = 15mA

SW = 0V, Enable = 0V

SW = 0V, Enable = high, Vp = 0V

Note 4

3.4

W

9.6 13.5

mΩ

4.2

6.1

200 300 500

mV

1

µA

20

ns

Iin(Standby)

Iin(Dyn)

EN = Low, No Switching

EN = High, Fs = 600kHz,

Vin = PVin = 21V

100

µA

20

23

mA

Vcc

Vin(min) = 6.8V, Icc = 0‐50mA, Cload =

2.2uF, DCM = 0

6.0

6.4

6.7

V

Vin(min) = 6.8V, Icc = 0‐50mA, Cload =

2.2uF, DCM = 1

4.0

4.4

4.85

Vcc_drop

Ishort

Icc=50mA,Cload=2.2uF

0.8

V

70

mA

6 JANUARY 18, 2013 | DATA SHEET| Rev 3.4

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