AP6714

1.8MHz SYNCHRONOUS BOOST CONVERTER

AP6714 Rev. 4

3 of 15

FEBRUARY 2009

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Block Diagram

EN

FB

By Pass

Error

Amplifier

-

+

-

+

SGND

BANDGAP

Vref=1.23V

Soft - Start

Thermal - shutdown

Bias

Oscillator

Ramp

PWM

Comparator

Smith - Trigger

PWM

Control

&

Anti -

Through

Logic

LX

PGND

OCP

Current - Limit

+

-

0.16V

OCP

Comparator

ZCR

Comparator

+

-

Power - Good

CC

VCC

OUT

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

ESD HBM

Human Body Model ESD Protection

3

KV

ESD MM

Machine Model ESD Protection

250

V

-0.3 to +6.5

V

LX to GND

-0.3 to (OUT + 0.3)

V

LX Current

1.6

A

REF, CC to GND

V

850

mW

Operating Junction Temperature Range

-40 to +125

Storage Temperature Range

-65 to +150

Recommend Operating Conditions

Symbol

Parameter

Rating

Unit

Operating Ambient Temperature Range

-40 to +85

0.9 to 5.5

V

Output Voltage

1.8 to 5.5

V

Notes:

3. The AP6714 is powered by step-up output. An internal low-voltage startup oscillator drives the starting at approximately 0.9V and the main

control will take over as soon as output is reached. AP6714 operation could be kept in low input voltage and output current is just limited.