850kHz 1A Synchronous Buck DC/DC Converter
Electrical Characteristics
values are at T
A
= 25°C)
Symbol
V
IN
V
OUT
I
LIM
I
Q
∆V
OUT
(V
OUT
*∆V
IN
)
∆V
OUT
/V
OUT
F
OSC
R
DSON(H)
R
DSON(L)
V
EN(H)
V
EN(L)
I
EN
V
UVLO
V
UVLO(hys)
T
SD
T
HYS
I
SHDN
V
TH(POK)
R
POK
AAT1152
(V
IN
= V
CC
= V
P
= 5V, T
A
= -40 to 85°C unless otherwise noted. Typical
Description
Operation Voltage
DC Output Voltage Tolerance
Current Limit
Quiescent Supply Current
Load Regulation
Line Regulation
Oscillator frequency
High-side Switch On-resistance
Low-side Switch On-resistance
Enable input high voltage
Enable input low voltage
Enable Pin Leakage Current
Undervoltage Lockout
Undervoltage Lockout Hysteresis
Over Temp Shutdown Threshold
Over Temp Shutdown Hysteresis
Shutdown current
Power Good Threshold
Power Good Pull-Down
On-Resistance
Conditions
I
OUT
= 500mA
T
A
= 25°C
Full temp
Min
2.7
-1.0
-2.0
1.2
Typ
Max
5.5
+1.0
+2.0
Units
V
%
A
µA
%
%/V
kHz
mΩ
mΩ
V
V
µA
V
mV
°C
°C
µA
% of
V
FB
Ω
T
A
= 25°C
No load, V
FB
= 0
V
IN
= 4.2V, I
LOAD
= 0 to 1A
V
IN
= 2.7 to 5.5V
T
A
= 25°C
T
A
= 25°C
T
A
= 25°C
V
IN
= 2.7 to 5.5V
V
IN
= 2.7 to 5.5V
V
EN
= 5.5V
V
IN
rising
V
IN
falling
700
160
3
0.2
850
110
100
300
1000
150
150
0.6
1
2.5
1.4
1.2
250
140
15
V
EN
= 0, V
IN
= 5.5V
V
FB
Ramping Up
V
FB
Ramping Down
1
90
88
4
4
1152.2003.01.0.9
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
