Low-Dropout, Low I , 1A Linear Regulator
Q
ABSOLUTE MAXIMUM RATINGS
Storage Temperature Range.............................-65°C to +150°C
IN, SHDN, RST to GND ............................................-0.3V to +6V
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Soldering Temperature (reflow)
OUT, SET to GND........................................-0.3V to (V + 0.3V)
Output Short-Circuit Duration ............................................Infinite
IN
Continuous Power Dissipation (T = +70°C)
A
Lead(Pb)-Free Packages..............................................+260°C
Packages Containing Lead(Pb)....................................+240°C
TSSOP-EP (derate 19mW/°C above +70°C).....................1.5W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°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.
MAX1793
ELECTRICAL CHARACTERISTICS
(V = V
+ 0.5V or V = 2.5V (whichever is greater), SHDN = IN, T = +0°C to +85°C, unless otherwise noted. Typical values
IN
OUT(NOM)
IN
A
are at T = +25°C.)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
2.5
2.0
-1
TYP
MAX
5.5
UNITS
Input Voltage
V
V
V
V
IN
IN
Input Undervoltage Lockout
2.3
Preset V
≥ 2.5V
+1
OUT
OUT
T
= +85°C,
= 250mA
A
I
OUT
Preset V
< 2.5V
-1.5
-2
+1.5
+2
Output Voltage Accuracy
(Preset Mode, SET = GND)
T
A
= 0°C to +85°C, I
= 0°C to +85°C, I
= 250mA
ꢀ
OUT
T
A
= 1mA to 1A,
OUT
-3
+3
V
> V
+ 0.5V
IN
OUT
T
T
= +85°C, I
= 250mA, V = 3V
1.229
1.219
1.212
1.250
1.271
1.281
1.288
A
OUT
IN
SET Voltage Threshold
(For Adjustable Output)
= 0°C to +85°C, I
= 250mA, V = 3V
IN
V
V
A
OUT
T = 0°C to +85°C, I
A
= 1mA to 1A, V = 3V
IN
OUT
Adjustable Output Voltage
Range
1.25
5
Maximum Output Current
Short-Circuit Current Limit
I
Continuous, V ≥ 3V
1
A
OUT
IN
RMS
I
V
= 0V, V ≥ 3V
1.1
1.8
2.8
3.3
A
LIM
OUT
IN
V
V
within 4ꢀ of nominal output voltage,
= 5.5V
OUT
In-Regulation Current Limit
A
IN
SET Pin Dual Mode Threshold
SET Input Bias Current
Ground Current
50
150
100
200
350
450
mV
nA
µA
I
V
= +1.25V
= 100µA
SET
SET
I
I
125
210
270
GND
OUT
MAX1793-33, -50
MAX1793-25
I
= 1A,
OUT
Dropout Voltage (Note 1)
Line Regulation
V
- V
mV
IN
OUT
SET = GND
V
from (V
+ 0.1V) to +5.5V,
IN
OUT
∆V
∆V
-0.15
0
+0.15
ꢀ/V
ꢀ
LNR
LDR
I
= 5mA, SET = GND
OUT
Load Regulation
I
= 100µA to 1A
0.7
115
0.1
OUT
Output Voltage Noise
Shutdown Supply Current
10Hz to 1MHz, C
= 6.8µF (ESR < 0.1Ω)
µV
RMS
OUT
I
SHDN = GND, V = +5.5V
16
µA
OFF
IN
Output Pulldown Resistance in
Shutdown
SHDN = GND
5
kΩ
2
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