MAX1793
Low-Dropout, Low I
Q
, 1A Linear Regulator
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN, SHDN, RST to GND ............................................-0.3V to +6V
OUT, SET to GND ........................................-0.3V to (V
IN
+ 0.3V)
Output Short-Circuit Duration ............................................Infinite
Continuous Power Dissipation (T
A
= +70°C)
TSSOP-EP (derate 19mW/°C above +70°C).....................1.5W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Soldering Temperature (reflow)
Lead(Pb)-Free Packages..............................................+260°C
Packages Containing Lead(Pb)....................................+240°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
Preset V
OUT
≥ 2.5V -1 +1
T
A
= +85°C,
I
OUT
= 250mA
Preset V
OUT
< 2.5V -1.5 +1.5
T
A
= 0°C to +85°C, I
OUT
= 250mA -2 +2
Output Voltage Accuracy
(Preset Mode, SET = GND)
T
A
= 0°C to +85°C, I
OUT
= 1mA to 1A,
V
IN
> V
OUT
+ 0.5V
-3 +3
%
T
A
= +85°C, I
OUT
= 250mA, V
IN
= 3V 1.229 1.250 1.271
T
A
= 0°C to +85°C, I
OUT
= 250mA, V
IN
= 3V 1.219 1.281
SET Voltage Threshold
(For Adjustable Output)
T
A
= 0°C to + 85°C , I
OU T
= 1m A to 1A, V
IN
= 3V 1.212 1.288
V
Adjustable Output Voltage
Range
1.25 5 V
Maximum Output Current I
OUT
Continuous, V
IN
≥ 3V 1 A
RM S
Short-Circuit Current Limit I
LIM
V
OUT
= 0V, V
IN
≥ 3V 1.1 1.8 3.3 A
In-Regulation Current Limit
V
OUT
within 4% of nominal output voltage,
V
IN
= 5.5V
2.8 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 125 200 µA
MAX1793-33, -50 210 350
Dropout Voltage (Note 1) V
IN
- V
OUT
I
OUT
= 1A,
SET = GND
MAX1793-25 270 450
mV
Line Regulation ∆V
LNR
V
IN
from (V
OUT
+ 0.1V) to +5.5V,
I
OUT
= 5mA, SET = GND
-0.15 0 +0.15 %/V
Load Regulation ∆V
LDR
I
OUT
= 100µA to 1A 0.7 %
Output Voltage Noise 10Hz to 1MHz, C
OUT
= 6.8µF (ESR < 0.1Ω) 115 µV
RMS
Shutdown Supply Current I
OFF
SHDN = GND, V
IN
= +5.5V 0.1 16 µA
Output Pulldown Resistance in
Shutdown
SHDN = GND 5 kΩ
