Belling BL8024CB5TR Schematic [ru]

1A 1.5MHz 6V Synchronous Buck Converter

BL8024

1

2

3

5

4

SOT23-5

VIN

SW

FB

EN

GND

GGYW

BL8024

DESCRIPTION

The BL8024 is a high-efficiency, DC-to-DC step­down switching regulators, capable of delivering up
to 1A of output current. The device operates from
an input voltage range of 2.6V to 6.0V and provides
an output voltage from 0.6V to VIN, making the
BL8024 ideal for low voltage power conversions.
Running at a fixed frequency of 1.5MHz allows the
use of small external components, such as ceramic
input and output caps, as well as small inductors,
while still providing low output ripples. This low
noise output along with its excellent efficiency
achieved by the internal synchronous rectifier,
making BL8024 an ideal green replacement for
large power consuming linear regulators. Internal
soft-start control circuitry reduces inrush current.
Short-circuit and thermal-overload protection
improves design reliability.

BL8024 is housed in a SOT23-5 Package

FEATURES

 High Efficiency: Up to 96%
 Capable of Delivering 1A (Vin  3.3V)
 1.5MHz Switching Frequency
 No External Schottky Diode Needed
 Low dropout 100% Duty operation
 Internal Compensation and Soft-Start
 Current Mode control
 0.6V Reference for Low Output voltages
 Logic Control Shutdown (IQ<1uA)
 Thermal shutdown and UVLO
 Available in SOT23-5

APPLICATIONS

 Cellular phones
 Digital Cameras
 MP3 and MP4 players
 Set top boxes
 Wireless and DSL Modems
 USB supplied Devices in Notebooks
 Portable Devices

TYPICAL APPLICATION

PIN OUT & MARKING

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GG: Product Code
YW: Date code (Year & Week)

BL8024

PART No.

PACKAGE

Tape&Reel

BL8024CB5TR

SOT23-5

3000/Reel

Parameter

Value

Max Input Voltage

6.3V

Max Operating Junction Temperature(Tj)

125C

Ambient Temperature(Ta)

-40C – 85C

Maximum Power Dissipation

SOT23-5

400mW

Storage Temperature(Ts)

-40C - 150C

Lead Temperature & Time

260C, 10S

ESD (HBM)

>2000V

Parameter

Value

Input Voltage Range

Max. 6V

Operating Junction Temperature(Tj)

-20C –125C

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDD

Input Voltage Range

2.6 6.0

V

Vref

Feedback Voltage

Vin=5V

0.585

0.6

0.615 V Ifb

Feedback Leakage current

0.1

0.4

uA

Iq

Quiescent Current
Active, Vfb=0.65, No Switching

40

uA

Shutdown

1

uA

LnReg

Line Regulation

Vin=2.7V to 5.5V

0.04

0.2

%/V

LdReg

Load Regulation

Iout=0.01 to 1A

0.1

0.2

%/A

Fsoc

Switching Frequency

1.3

1.5

1.7

MHz

RdsonP

PMOS Rdson

280

350

mohm

RdsonN

NMOS Rdson

190

250

mohm

Ilimit

Peak Current Limit

Vin  3.3V

1.2

1.5 2 A

Iswlk

SW Leakage Current

Vout=5.5V, VSW=0 or 5.5V, EN=0V

10

uA

Ienlk

EN Leakage Current

1

uA

Vh_en

EN Input High Voltage

1.5 V Vl_en

EN Input Low Voltage

0.4

V

ORDERING INFORMATION

ABSOLUTE MAXIMUM RATING

Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect
device reliability.

RECOMMENDED WORK CONDITIONS

ELECTRICAL CHARACTERISTICS

(VDD=5V, TA=25C)

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BL8024

PIN #

NAME

DESCRIPTION

1

EN

Enable pin for the IC. Drive the pin to high to enable the part, and low to disable

2

GND

Ground 3 SW

Inductor connection. Connect an inductor between SW and the regulator output.

4

VIN

Supply voltage.

5

FB

Feedback input. Connect an external resistor divider from the output to FB and GND to set
the output to a voltage between 0.6V and Vin

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.001 0.01 0.1 1

Efficiency

Iout (A)

Efficiency / Vout=3.3V

VIN=6V

VIN=5V

VIN=4V

VIN=3.7V

PIN DESCRIPTION

ELECTRICAL PERFORMANCE

Tested under TA=25C, unless otherwise specified

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