Instruction Manual

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
=400kΩ
400 500 600 kHz
Minimum CLK Pulse
Width
75 ns
RT/CLK Voltage
R
T
=400kΩ
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
Ω
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