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Preliminary datasheet, Electrical characteristics (continued) – Diodes AP3433 User Manual

Page 6

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Preliminary Datasheet

3A, 2MHz High Performance Synchronous Buck Converter AP3433

Jul. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

6

Electrical Characteristics (Continued)

V

IN

=2.95 to 5.5V, T

A

=25ºC, unless otherwise specified. Specifications with boldface type apply over full

operating temperature range from -40 to 85ºC.

Parameters Symbol

Conditions

Min Typ Max Unit

TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN)

Switching Frequency
Range (RT Mode)

300 2000 kHz

Switching Frequency
Range (CLK Mode)

300 2000 kHz

Switching Frequency

f

S

R

T

=400k

400 500 600 kHz

Minimum CLK Pulse
Width

75

ns

RT/CLK Voltage

R

T

=400k

0.5 V

RT/CLK High
Threshold

1.6 2.2 V

RT/CLK Low
Threshold

0.4 0.6

V

BOOT (BOOT PIN)

BOOT Charge Resistor

R

BOOT

V

IN

=5V

16

BOOT-SW UVLO

V

IN

=2.95V

2.2

V

SOFT START (SS PIN)

Charge Current

I

SS

V

SS

=0.4

2.2

µA

SS to Reference
Crossover

V

SS

98%

Nominal

1.1

V

POWER GOOD (PGD PIN)

Feedback Threshold

V

FB_TH

V

FB

Falling (Fault)

91

%V

REF

V

FB

Rising (Good)

93

V

FB

Rising (Fault)

107

V

FB

Falling (Good)

105