Datasheet

MAX1735
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 2, V
IN
= V
OUT
- 1V, V
SHDN
= V
IN
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Note 1)
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, SET to GND .................................................... -7.0V to +0.3V
SHDN to GND ............................................ (V
IN
- 0.3)V to +7.0V
OUT to GND ...............................................(V
IN
- 0.3)V to +0.3V
Output Short-Circuit Duration ........................................Indefinite
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)........... 571mW
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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage V
IN
-6.5 -2.5 V
T
A
= +25° C, I
OUT
= -100µA -1 +1
I
OUT
= -100µA, T
A
= 0°C to +85°C-2+2Output Voltage Accuracy
I
LOAD
= -100µA to -200mA -3 +2
%
Circuit of Figure 3, T
A
= +25° C, I
OUT
= -100µA -1.2625 -1.25 -1.2375
Circuit of Figure 3, I
OUT
= -100µA,
T
A
= 0°C to +85°C
-1.275 -1.225
SET Regulation Set Point
Circuit of Figure 3, I
LOAD
= -100µA to -200mA -1.275 -1.2125
V
Maximum Output Current I
OUT
-200 mA
Current Limit I
LIM
V
OUT
= 0 -1020 -515 -250 mA
I
OUT
= -100µA -180 -85
Ground-Pin Current I
Q
I
OUT
= -200mA -125
µA
I
OUT
= -100mA 40
Dropout Voltage (Note 2)
I
OUT
= -200mA 80 240
mV
Line Regulation
Circuit of Figure 3,
V
IN
from -6.5V to -2.5V, V
OUT
= -1.25V
-0.15 0 +0.15 %/V
Load Regulation I
OUT
from 0mA to -200mA 0.004 %/mA
Output Voltage Noise 10Hz to 1MHz, C
OUT
= 1µF 160 µV
RMS
Power-Supply Rejection Ratio PSRR f = 100Hz 60 dB
T
A
= +25° C -1 -0.001
Shutdown Supply Current V
SHDN
= 0
T
A
= +85° C-1
µA
Positive voltage at SHDN +1.6
SHDN Input High Threshold
(Note 3)
Negative voltage at SHDN -1.6
V
Positive voltage at SHDN +0.4
SHDN Input Low Threshold
(Note 3)
Negative voltage at SHDN -0.4
V
Set Input Bias Current I
SET
V
SET
= -1.25V, T
A
= +25° C -100 -15 nA
V
SHDN
= +6.5V 3.5
SHDN Input Bias Current T
A
= +25° C
V
SHDN
= 0, -6.5V -0.5 +0.5
µA
Thermal Shutdown Junction
Temperature
Hysteresis = 15°C (typ) 160 °C
Note 1: Limits are 100% production tested at T
A
= +25°C. Limits over operating temperature range are guaranteed by design.
Note 2: The dropout voltage is defined as V
OUT
- V
IN
, when V
OUT
is 100mV above the nominal value of V
OUT
.
Note 3: The SHDN logic input can be driven by either a positive voltage or a negative voltage. | V
SHDN
| < 0.4V puts the device in shutdown,
while | V
SHDN
| > 1.6V enables the device.