Datasheet

MAX1793
Low-Dropout, Low I
Q
, 1A Linear Regulator
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
OUT(NOM)
+ 0.5V or V
IN
= 2.5V (whichever is greater), SHDN = IN, T
A
= +0°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT(NOM)
+ 0.5V or V
IN
= 2.5V (whichever is greater), SHDN = IN, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
IH
1.6
SHDN Input Threshold
V
IL
+2.5V < V
IN
< +5.5V
0.6
V
SHDN Input Bias Current I
SHDN
SHDN = GND or IN
0.01
1µA
RST Output Low Voltage VOL
I
SINK
= 1mA
0.1 V
Operating Voltage Range for
RST Valid
I
SINK
= 100µA 1.0 5.5
V
RST Output High Leakage V
RST
= +5.5V
0.01
1µA
RST Trip Level Referred to
Nominal V
OUT
Rising edge 90 94 96
% V
OUT
RST Release Delay Rising edge 1.5 4.0 8.0 ms
Thermal Shutdown Temperature
T
SHDN
Typical thermal hysteresis = 20°C 170 °C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage
V
IN
2.5 5.5 V
Input Undervoltage Lockout
V
IN
2.0 2.3 V
I
OUT
= 250mA
-2.5 2.5
Output Voltage Accuracy
(preset mode, SET = GND)
I
OUT
= 1mA to 1A, V
IN
> V
OUT
+ 0.5V
-3.2 3.2
%
I
OUT
= 250mA, V
IN
= 3V
1.216 1.284
SET Voltage Threshold
(for adjustable output) I
OUT
= 1mA to 1A, V
IN
= 3V
1.210 1.290
V
Adjustable Output Voltage
Range
1.25 5 V
Maximum Output Current
I
OUT
Continuous, V
IN
≥ 3V
1
A
RMS
Short-Circuit Current Limit
I
LIM
V
OUT
= 0V, V
IN
≥ 3V
1.1 3.3 A
SET Pin Dual Mode Threshold 50 150 mV
SET Input Bias Current
I
SET
V
SET
= +1.25V
±100
nA
Ground Current
I
GND
I
OUT
= 100µA
200 µA
MAX1793-33, -50
350
Dropout Voltage (Note 1)
V
IN
-
V
OUT
I
OUT
= 1A,
SET = GND
MAX1793-25
450
mV
Line Regulation
∆V
LNR
V
IN
from (V
OUT
+ 0.1V) to +5.5V,
I
OUT
= 5mA, SET = GND
-0.15 0.15 %/V
Shutdown Supply Current
I
OFF
SHDN = GND, V
IN
= +5.5V
16 µA
V
IH
1.6
SHDN Input Threshold
V
IL
+2.5V < V
IN
< +5.5V
0.6
V
SHDN Input Bias Current
I
S H D N
SHDN = GND or IN 1 µA
RST Output Low Voltage
V
OL
I
SINK
= 1mA
0.1 V