Instruction Manual

Preliminary Datasheet
3A, 2MHz High Performance Synchronous Buck Converter AP3433
Jul. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
5
Electrical Characteristics
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
SUPPLY VOLTAGE (VIN PIN)
Input Voltage V
IN
2.95 5.5 V
Quiescent Current I
Q
V
FB
=0.9V,V
IN
=5V,
T
A
=25°C, R
T
=400kΩ
360 575 µA
Shutdown Supply
Current
I
SHDN
V
EN
=0V,T
A
=25°C
2.95V≤V
IN
≤5.5V
2 5 µA
ENABLE AND UVLO (EN PIN)
Enable Threshold
V
EN_H
Rising 1.16 1.25 1.37 V
V
EN_L
Falling 1.18 V
Internal Under Voltage
Lockout Threshold
V
UVLO
2.6 2.8 V
Internal Under Voltage
Hysteresis
V
HYS
150 mV
VOLTAGE REFERENCE (FB PIN)
Voltage Reference V
REF
2.95V≤V
IN
≤5.5V
0.802 0.827 0.852
V
MOSFET
High Side Switch
On-resistance
R
ON_H
V
BOOT-SW
=5V 45 81
mΩ
V
BOOT-SW
=2.95V 64 110
mΩ
Low Side Switch
On-resistance
R
ON_L
V
IN
=5V 42 81
mΩ
V
IN
=2.95V 59 110 mΩ
CURRENT LIMIT
Current Limit
Threshold
I
LIMIT
4.2 6.6 A
THERMAL SHUTDOWN
Thermal Shutdown T
TSD
140
°C
Hysteresis 20
°C