BL3406B-1.2V datasheet(4/11 Pages) BELLING

Part #	BL3406B-1.2V

Description	1.5 MHz, 800mA Synchronous Buck Converter

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BL3406B Rev 1.5

Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited

10/2009

4

BL3406B

1.5 MHz, 800mA Synchronous Buck Converter

Electrical Characteristics (Note 5)

(VIN =VRUN= 3.6V, TA = 25°C, unless otherwise noted.)

Parameter

Conditions

MIN

TYP

MAX

Unit

Input Voltage Range

2.5

5.5

V

Input DC Supply Current

Active Mode

Shutdown Mode

VFB=0.5V or VOUT=90%

VFB=0V, VIN=4.2V

180

0.1

300

1.0

µA

TA = +25°C

0.5880

0.6000

0.6120

V

TA= 0°C ≤ TA ≤ 85°C

0.5865

0.6000

0.6135

V

Regulated Feedback

Voltage

TA= -40°C ≤ TA ≤ 85°C

0.5850

0.6000

0.6150

V

VFB Input Bias Current

VFB = 0.65V

±30

nA

Reference Voltage Line

Regulation

VIN = 2.5V to 5.5V

0.04

0.4

%/V

BL3406B-1.2, -40°C ≤ TA ≤ 85°C

1.164

1.200

1.236

V

Regulated Output Voltage

BL3406B-1.8, -40°C ≤ TA ≤ 85°C

1.746

1.800

1.854

V

∆VOVL = VOVL – VFB, Adjustable Version

20

50

80

mV

Output Overvoltage

Lockout

∆VOVL = VOVL – VOUT, Fixed Version

2.5

7.8

13

%

Output Voltage Line

Regulation

VIN = 2.5V to 5.5V

0.04

0.40

%

Output Voltage Load

Regulation

0.5

%

Peak Inductor Current

VIN=3V, VFB=0.5V or VOUT=90%

Duty Cycle <35%

1.2

A

Oscillator Frequency

VFB=0.6V or VOUT=100%

1.2

1.5

1.8

MHz

RDS(ON) of P-CH MOSFET

ISW = 300mA

0.40

0.50

RDS(ON) of N-CH MOSFET

ISW = -300mA

0.35

0.45

SW Leakage Current

VRUN = 0V, VSW= 0V or 5V, VIN = 5V

±0.01

±1

µA

RUN Threshold

-40°C ≤ TA ≤ 85°C

0.3

1.1

1.30

V

RUN Leakage Current

±0.01

±1

µA

Note 5: 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and

characterization.

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