PRODUCT DATASHEET
AAT2786
SystemPower
TM
1.5A Step-Down Converter and 150mA LDO
Electrical Characteristics (continued)
V
LDOIN
= V
OUT(NOM)
+ 1V for V
OUT
options greater than 1.5V. V
IN
= 2.5 for V
OUT
≤1.5V.
I
OUT
= 1mA, C
OUT
= 2.2µF, C
IN
= 1µF,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C.
Symbol
V
LDOOUT
I
LDOOUT
V
DO
I
SC
I
Q
I
SD
ΔV
OUT
/
V
OUT
*ΔV
IN
ΔV
OUT(line)
ΔV
OUT(load)
PSRR
e
N
T
SD
T
HYS
T
C
Enable
V
IL
V
IH
I
EN_BUCK
I
EN_LDO
t
ENDLY
Description
Output Voltage Tolerance
Output Current
Dropout Voltage
2, 3
Short-Circuit Current
Ground Current
Shutdown Current
Line Regulation
Dynamic Line Regulation
Dynamic Load Regulation
Power Supply Rejection Ratio
Output Noise
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Output Voltage Temperature Coefficient
Enable
Enable
Enable
Enable
Enable
Threshold Low
Threshold High
Leakage Current
Leakage Current
Delay Time
Conditions
T
A
= 25°C
I
LDOOUT
= 1mA
to 150mA
T
A
= -40°C to 85°C
V
LDOOUT
> 1.2V
I
LDOOUT
= 150mA
V
LDOOUT
< 0.4V
V
IN
= 5V, No Load, EN = V
IN
V
IN
= 5V, EN = 0V
V
IN
= V
OUT
+ 1 to 5.0V
V
IN
= V
LDOOUT
+ 1V to V
LDOOUT
+ 2V,
I
LDOOUT
= 150mA, T
R
/T
F
= 2µs
I
LDOOUT
= 1mA to 150mA, T
R
< 5µs
1 kHz
I
LDOOUT
= 10mA,
10kHz
C
BYP
= 10nF
1MHz
Noise Power BW = 300Hz - 50kHz
Min
-1.5
-2.5
150
Typ
Max
1.5
2.5
Units
%
mA
mV
mA
µA
µA
%/V
mV
mV
dB
µVrms
°C
°C
ppm/°C
LDO Regulator
200
600
70
300
125
1
0.09
2.5
30
67
47
45
50
145
12
22
0.6
1.4
V
EN_BUCK
= 5V
V
EN_LDO
= 5V
BYP = Open
1
1.0
15
V
V
µA
µA
µs
1. V
DO
is defined as V
LDOIN
- V
LDOOUT
when V
LDOOUT
is 98% of nominal.
2. For V
LDOOUT
< 2.3V, V
DO
= 2.5V - V
LDOOUT
.
2786.2008.04.1.0
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