AAT3238
300mA MicroPower™
High Performance LDO Linear Regulator
Electrical Characteristics1
VIN = VOUT(NOM) + 1V for VOUT options greater than 1.5V. VIN = 2.5V for VOUT ≤ 1.5V. IOUT = 1mA, COUT = 2.2µF,
CIN = 1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol Description
Conditions
Min Typ Max Units
TA = 25°C
-1.5
1.5
2.5
VOUT
Output Voltage Tolerance
IOUT = 1mA to 300mA
%
TA = -40 to 85°C -2.5
300
IOUT
VDO
ISC
Output Current
VOUT > 1.2V
IOUT = 300mA
VOUT < 0.4V
mA
mV
mA
µA
Dropout Voltage2, 3
Short-Circuit Current
Ground Current
400 600
600
IQ
VIN = 5V, No Load, EN = VIN
VIN = 5V, EN = 0V
70
125
1
ISD
Shutdown Current
µA
ΔVOUT
VOUT*ΔVIN
/
Line Regulation
VIN = VOUT + 1 to 5.0V
0.09
%/V
mV
VIN = VOUT + 1V to VOUT + 2V,
ΔVOUT(line) Dynamic Line Regulation
2.5
IOUT = 300mA, TR/TF = 2µs
IOUT = 1mA to 300mA, TR < 5µs
BYP = Open
ΔVOUT(load) Dynamic Load Regulation
60
15
mV
µs
V
tENDLY
VEN(L)
VEN(H)
IEN
Enable Delay Time
Enable Threshold Low
Enable Threshold High
0.6
1
1.5
V
Leakage Current on Enable Pin VEN = 5V
µA
1kHz
67
47
45
PSRR
TSD
Power Supply Rejection Ratio
IOUT = 10mA, CBYP = 10nF 10kHz
1MHz
dB
°C
Over-Temperature Shutdown
Threshold
145
Over-Temperature Shutdown
Hysteresis
THYS
eN
12
50
22
°C
Output Noise
µVrms
ppm/°C
Output Voltage Temperature
Coefficient
TC
1. The AAT3238 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
2. VDO is defined as VIN - VOUT when VOUT is 98% of nominal.
3. For VOUT < 2.1V, VDO = 2.5V - VOUT
.
4
3238.2006.11.1.6