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MAX1735EUK30+T

P1-P3P4-P6P7-P9P10-P10
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
♦ Guaranteed 200mA Output Current
♦ Low 80mV Dropout Voltage at 200mA
♦ Low 85µA Quiescent Supply Current
♦ Low 1nA Current Shutdown Mode
♦ Stable with 1µF C
OUT
♦ PSRR >60dB at 100Hz
♦ Thermal Overload Protection
♦ Short-Circuit Protection
♦ -5.0V, -3.0V, or -2.5V Output Voltage
or Adjustable (-1.25V to -5.5V)
♦ Tiny SOT23-5 Package
MAX1735
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
________________________________________________________________ Maxim Integrated Products 1
IN
SETSHDN
15OUTGND
MAX1735
SOT23-5
TOP VIEW
2
34
MAX1735
SHDN
-6.5V TO -2.5V
INPUT
-5V, -3V, OR -2.5V
OUTPUT
UP TO 200mA
C
IN
C
OUT
OUT
IN
SET
GND
GND
ON
OFF
ON
Typical Operating Circuit
19-1783; Rev 1; 11/03
Pin Configuration
Ordering Information
PART TEMP RANGE
PIN-
PACKAGE
MAX1735EUK50-T -40°C to +85°C 5 SOT23-5
MAX1735EUK30-T -40°C to +85°C 5 SOT23-5
MAX1735EUK25-T -40°C to +85°C 5 SOT23-5
Output-Voltage Selector Guide
PART
PRESET OUTPUT
VOLTAGE
SOT TOP
MARK
MAX1735EUK50-T -5.0V or adj ADOZ
MAX1735EUK30-T -3.0V or adj ADOY
MAX1735EUK25-T -2.5V or adj ADOX
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.
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.
MAX1735
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
_______________________________________________________________________________________ 3
0
40
20
100
80
60
160
140
120
180
0-2-3-1 -4 -5 -6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1735 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
I
LOAD
= 200mA
-7
70
90
80
110
100
130
120
140
08040 120 16020 10060 140 180 200
SUPPLY CURRENT
vs. LOAD CURRENT
MAX1735 toc02
LOAD CURRENT (mA)
SUPPLY CURRENT (µA)
0
40
20
100
80
60
160
140
120
180
-40 10-15 356085
SUPPLY CURRENT
vs. TEMPERATURE
MAX1735 toc03
TEMPERATURE (
°
C)
SUPPLY CURRENT (µA)
NO LOAD
I
LOAD
= 200mA
0
20
60
40
80
100
0507525 100 125 150 175 200
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX1735 toc04
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
T
A
= +25
°
C
T
A
= +85
°
C
T
A
= -40
°
C
V
OUT
= -2.9V
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0
05025 75 100 125 150 175 200
OUTPUT VOLTAGE CHANGE
vs. LOAD CURRENT
MAX1735 toc05
LOAD CURRENT (mA)
OUTPUT VOLTAGE CHANGE (%)
V
OUT
= -3V
T
A
= -40
°
C
T
A
= +25
°
C
T
A
= +85
°
C
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
-40 -15 10 35 60 85
OUTPUT VOLTAGE CHANGE
vs. TEMPERATURE
MAX1735 toc06
TEMPERATURE (°C)
OUTPUT VOLTAGE CHANGE (%)
I
LOAD
= 200mA
NO LOAD
Typical Operating Characteristics
(Circuit of Figure 2, V
IN
= -4.0V, V
OUT
= -3.0V, T
A
= +25°C, unless otherwise specified.)
P1-P3P4-P6P7-P9P10-P10

MAX1735EUK30+T

Mfr. #:
Buy MAX1735EUK30+T
Manufacturer:
Maxim Integrated
Description:
LDO Voltage Regulators 200mA Negative Output
Lifecycle:
New from this manufacturer.
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