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PMU with a Synchronous 18V 2A Buck and a CMOS 6V 1.5A LDO

BL8083

DESCRIPTION

The BL8083 is a power management unit (PMU),

with 1 synchronous 18V Buck and 1 CMOS 6V low-

dropout regulator that delivers a maximum

current of 2A for Buck’s output and a maximum

current of 1.5A for LDO’s output.

The synchronous buck is a high-efficiency, DC-to-DC

step-down

switching

regulator,

capable

of

delivering up to 2A of output current. It is a fully

integrated, high-efficiency synchronous rectified

step-down converter. It operates at high efficiency

over a wide output current load range. It offers

PWM switching control, which allows a high

efficiency over the wider range of the load.

The LDO is a low-dropout regulator that delivers a

maximum current of 1.5A output. Typical dropout

voltage at 1A load current is 0.3V. It has excellent

load and line transient response and good

temperature characteristics, which can assure the

stability of chip and power system. The output

accuracy is set within 2% by trimming.

voltage can be provided in the range of 1.2V~5V

every 0.1V step. It also can be customized on

command. LDO can also work under a wide input

voltage ranging from 2V to 6V. They can provide

foldback short-circuit protection and output

current limit function.

BL8083 is available in lead (Pb)-free DFN2X3-8 (with

exposed pad for heat dissipation) package.

PIN OUT & MARKING

DFN2x3-8

FEATURES

BUCK

 High Efficiency : Up to 96%

 Capable of Delivering 2A

 500KHz Frequency Operation

 No External Schottky Diode Needed

 4.2V to 18V Input Voltage Range

 0.8V Reference

 Logic Control Shutdown (IQ<1uA)

 Slope Compensated Current Mode Control for

Excellent Line and Load Transient Response

 Integrated internal compensation

 Stable with Low ESR Ceramic Output Capacitors

 Over Current Protection with Hiccup-Mode

 Thermal Shutdown

 Inrush Current Limit and Soft Start

LDO

 Max output current is 1.5A

 Input voltage range: 2 – 6V

 Output voltage range: 1.2V~5V (customized

on command every 0.1V step)

 Low Quiescent Current: 100uA at 5V

 High PSRR: 70dB range to 1KHz

 Low Output Noise: 44uVRMS

 Low Dropout: 300mV at 1A load

 Low ESR Ceramic Capacitor Compatible

 Low temperature coefficient: ±100ppm/C

 Excellent line regulation: 0.05%/V

 Highly accurate: ±2%

 Output current limit

APPLICATIONS

 Distributed Power Systems

 Digital Set Top Boxes

 Flat Panel Television and Monitors

 Wireless and DSL Modems

 Power source for cellular phones and various

kind of PCSs

 Battery Powered equipment

FB

VDD

BS

LGND

2

1

4

3

7

8

5

6

SW

VOUT

VI

EN

9

GND

GS: Product Code

YW: Date code (Year & Week)

LLLL: Lot No.

XX: Output Voltage

e.g. 33=3.3V