MAX1793EUE Maxim Integrated Products, MAX1793EUE Datasheet

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MAX1793EUE

Manufacturer Part Number
MAX1793EUE
Description
Low-Dropout, Low IQ, 1A Linear Regulator
Manufacturer
Maxim Integrated Products
Datasheet

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19-1654; Rev 1; 11/00
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
The MAX1793 low-dropout linear regulator (LDO) oper-
ates from +2.5V to +5.5V and delivers a guaranteed 1A
load current with a low 210mV dropout. The high-accu-
racy (±1%) output voltage is preset at an internally
trimmed voltage (see Ordering Information) or can be
adjusted from 1.25V to 5.0V with an external resistor-
divider.
An internal PMOS pass transistor allows a low 125µA
supply current, making the MAX1793 ideal for battery-
operated portable equipment. Other features include a
built-in reset output, low-power shutdown, and short-cir-
cuit and thermal overload protection. The MAX1793 is
available in a 1.5W, 16-pin power TSSOP package,
which is 30% smaller than a SOT223 package and only
1.1mm high.
________________________Applications
IN
C
ON
IN
Notebook Computers
Cordless Telephones
Cellular Phones
Modems
Hand-Held Instruments
PDAs and Palmtop Computers
OFF
Low-Dropout, Low I
Typical Operating Circuit
IN
NC
IN
IN
IN
SHDN
________________________________________________________________ Maxim Integrated Products
MAX1793
General Description
GND
OUT
OUT
OUT
OUT
RST
SET
OUTPUT
C
RESET
OUT
OUT
*EP = Exposed Pad
† Contact factory for other preset output voltages.
o Guaranteed 1A Output Current
o Low 210mV Dropout at 1A
o Up to ±1% Output Voltage Accuracy
o Reset Output (4ms delay)
o Low 125µA Ground Current
o 0.1µA Shutdown
o Low 115µV
o Thermal Overload Protection
o Output Current Limit
o Tiny TSSOP Power Package (1.5W)
Q
MAX1793EUE-50 -40°C to +85°C
MAX1793EUE-33 -40°C to +85°C 16 TSSOP-EP*
MAX1793EUE-25 -40°C to +85°C 16 TSSOP-EP
MAX1793EUE-20 -40°C to +85°C 16 TSSOP-EP
MAX1793EUE-18 -40°C to +85°C 16 TSSOP-EP
MAX1793EUE-15 -40°C to +85°C 16 TSSOP-EP
TOP VIEW
, 1A Linear Regulator
Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V or 5.0V
Adjustable from 1.25V to 5.0V
30% Smaller than SOT223 (only 1.1mm high)
PART
SHDN
N.C.
N.C.
RST
RMS
IN
IN
IN
IN
1
2
6
3
4
5
7
8
Output Noise
RANGE
TEMP.
Ordering Information
TSSOP-EP
MAX1793
Pin Configuration
16 TSSOP-EP*
PACKAGE
16
15
14
13
12
11
10
9
PIN-
N.C.
OUT
OUT
OUT
OUT
SET
GND
N.C.
Features
5.0 or Adj
3.3 or Adj
2.5 or Adj
2.0 or Adj
1.8 or Adj
1.5 or Adj
V
OUT
(V)
1

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MAX1793EUE Summary of contents

Page 1

... MAX1793EUE-50 -40°C to +85°C MAX1793EUE-33 -40°C to +85°C 16 TSSOP-EP* MAX1793EUE-25 -40°C to +85°C 16 TSSOP-EP MAX1793EUE-20 -40°C to +85°C 16 TSSOP-EP MAX1793EUE-18 -40°C to +85°C 16 TSSOP-EP MAX1793EUE-15 -40°C to +85°C 16 TSSOP-EP *EP = Exposed Pad † Contact factory for other preset output voltages. TOP VIEW N ...

Page 2

Low-Dropout, Low I ABSOLUTE MAXIMUM RATINGS IN, SHDN, RST to GND ............................................-0.3V to +6V OUT, SET to GND ........................................-0. Output Short-Circuit Duration ............................................Infinite Continuous Power Dissipation (T = +70°C) A 16-Pin TSSOP-EP (derate 19mW/°C above +70°C)........1.5W Stresses beyond ...

Page 3

Low-Dropout, Low I ELECTRICAL CHARACTERISTICS (continued) = 2.5V (whichever is greater), SHDN = IN 0. OUT(NOM) IN are +25°C.) A PARAMETER SYMBOL RST Output Low Voltage Operating Voltage Range ...

Page 4

Low-Dropout, Low I ELECTRICAL CHARACTERISTICS (continued) = 2.5V (whichever is greater), SHDN = IN 0. OUT(NOM) IN PARAMETER SYMBOL Operating Voltage Range for RST Valid RST Output High Leakage RST Trip Level ...

Page 5

Low-Dropout, Low I (Circuit of Figure +5V SHDN IN DROPOUT VOLTAGE vs. LOAD CURRENT 300 250 200 150 100 200 400 600 800 1000 1200 LOAD CURRENT (mA) OUTPUT NOISE vs. ...

Page 6

Low-Dropout, Low I (Circuit of Figure +5V SHDN IN SHUTDOWN RESPONSE V OUT V SHDN I = 100mA OUT 40µs/div PIN NAME N.C. No Connection. Not internally connected. 16 Regulator Input. ...

Page 7

... SET. The Dual Mode comparator examines V path below 50mV, the internal feedback path SET is used and the output is regulated to the factory-preset voltage. Dual Mode is a trademark of Maxim Integrated Products. SHUTDOWN MOSFET DRIVER ERROR AMP WITH FOLDBACK CURRENT LIMIT 94% V ...

Page 8

Low-Dropout, Low I Internal P-Channel Pass Transistor The MAX1793 features a 1A P-channel MOSFET pass transistor. Unlike similar designs using PNP pass tran- sistors, P-channel MOSFETs require no base drive, which reduces quiescent current. PNP-based regula- tors also waste considerable ...

Page 9

Low-Dropout, Low I temperature drops approximately 20°C. Continuous short-circuit conditions will result in a pulsed output. Thermal overload protection is designed to safeguard the MAX1793 in the event of fault conditions. For con- tinuous operation, do not exceed the absolute ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products ...

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