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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1735 Datasheet

200mA / Negative-Output / Low-Dropout Linear Regulator

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19-1783; Rev 1; 11/03
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
General Description
The MAX1735 negative-output, low-dropout linear regu-
lator operates from a -2.5V to -6.5V input and delivers a
guaranteed 200mA with a low 80mV dropout. The high-
accuracy (±1%) output voltage is preset or can be
adjusted from -1.25V to -5.5V with an external resistive
voltage-divider.
An internal N-channel MOSFET allows for a low 85µA
quiescent current virtually independent of the load,
making this device ideal for battery-powered portable
equipment, such as PDAs, mobile phones, cordless
phones, and wireless data modems.
The device is available in several preset output voltage
versions: -5.0V, -3.0V, and -2.5V. All versions offer a
1nA low-power shutdown mode, short-circuit protec-
tion, and thermal overload protection. The device is
offered in a tiny 5-pin SOT23 package.
Applications
Disk Drives
Modems
Instrumentation Amplifiers
Notebook Computers
Mobile and Cordless Telephones
PCMCIA Cards
GaAsFET Bias
Mobile Wireless Data Modems
PDAs and Palmtop Computers
Features
o Guaranteed 200mA Output Current
o Low 80mV Dropout Voltage at 200mA
o Low 85µA Quiescent Supply Current
o Low 1nA Current Shutdown Mode
o Stable with 1µF COUT
o PSRR >60dB at 100Hz
o Thermal Overload Protection
o Short-Circuit Protection
o -5.0V, -3.0V, or -2.5V Output Voltage
or Adjustable (-1.25V to -5.5V)
o Tiny SOT23-5 Package
PART
MAX1735EUK50-T
MAX1735EUK30-T
MAX1735EUK25-T
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
Output-Voltage Selector Guide
PART
MAX1735EUK50-T
MAX1735EUK30-T
MAX1735EUK25-T
PRESET OUTPUT
VOLTAGE
-5.0V or adj
-3.0V or adj
-2.5V or adj
SOT TOP
MARK
ADOZ
ADOY
ADOX
Typical Operating Circuit
-6.5V TO -2.5V
INPUT
CIN
IN
-5V, -3V, OR -2.5V
OUTPUT
UP TO 200mA
OUT
COUT
ON
GND OFF
ON
MAX1735
SHDN
GND
SET
TOP VIEW
Pin Configuration
GND 1
5 OUT
MAX1735
IN 2
SHDN 3
4 SET
SOT23-5
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1735 Datasheet

200mA / Negative-Output / Low-Dropout Linear Regulator

No Preview Available !

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


Part Number MAX1735
Description 200mA / Negative-Output / Low-Dropout Linear Regulator
Maker Maxim
Total Page 10 Pages
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