AAT2500
1MHz Step-Down Converter/LDO Regulator
Electrical Characteristics1
Symbol Description
Conditions
Min
Typ Max
Units
V
IN = VLDO = VOUT(NOM) + 1V for VOUT options greater than 1.5V. VIN = VLDO = 2.5V for VOUT ≤ 1.5V. IOUT
=
LDO
1mA, COUT = 2.2µF, CIN = 1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
TA = 25°C
IOUT = 1mA to 300mA TA = -40°C
to 85°C
-1.5
-2.5
1.5
2.5
VOUT
Output Voltage Tolerance
%
2
VIN
VDO
Input Voltage
Dropout Voltage3, 4
VOUT+VDO
5.5
V
IOUT = 300mA
400 600
mV
ΔVOUT
VOUT*ΔVIN
/
Line Regulation
VIN = VOUT + 1V to 5V
0.09
%/V
mV
IOUT = 300mA, VIN = VOUT + 1V to
ΔVOUT(Line) Dynamic Line Regulation
2.5
60
VOUT + 2V, TR/TF = 2µS
IOUT = 1mA to 300mA, TR <5µS
VOUT > 1.3V
ΔVOUT(Load) Dynamic Load Regulation
mV
mA
mA
µA
IOUT
ISC
Output Current
300
Short-Circuit Current
LDO Quiescent Current
VOUT < 0.4V
600
IQLDO
VIN = 5V, No Load, ENLDO = VIN
70
125
1.0
VIN = 5V; ENLDO = GND,
ISHDN
PSRR
TSD
Shutdown Current
µA
dB
°C
EN = SGND = PGND
1kHz
67
47
45
Power Supply Rejection Ratio IOUT = 10mA, CBYP = 10nF 10kHz
1MHz
Over-Temperature Shutdown
Threshold
145
Over-Temperature Shutdown
Hysteresis
THYS
eN
12
50
22
°C
Output Noise
eNBW = 300Hz to 50kHz
µVRMS
ppm/°C
Output Voltage Temperature
Coefficient
TC
1. The AAT2500 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. To calculate the minimum LDO input voltage, use the following equation: VIN(MIN) = VOUT(MAX) + VDO(MAX), as long as VIN ≥ 2.5V.
3. For VOUT <2.1V, VDO = 2.5 - VOUT
.
4. VDO is defined as VIN - VOUT when VOUT is 98% of nominal.
4
2500.2006.05.1.16
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
