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PDF MAX1793 Data sheet ( Hoja de datos )
| Número de pieza | MAX1793 | |
| Descripción | Low-Dropout / Low IQ / 1A Linear Regulator | |
| Fabricantes | Maxim Integrated | |
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19-1654; Rev 1; 11/00
Low-Dropout, Low IQ, 1A Linear Regulator
General Description
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
Notebook Computers
Cordless Telephones
Cellular Phones
Modems
Hand-Held Instruments
PDAs and Palmtop Computers
Features
o Guaranteed 1A Output Current
o Low 210mV Dropout at 1A
o Up to ±1% Output Voltage Accuracy
Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V or 5.0V
Adjustable from 1.25V to 5.0V
o Reset Output (4ms delay)
o Low 125µA Ground Current
o 0.1µA Shutdown
o Low 115µVRMS Output Noise
o Thermal Overload Protection
o Output Current Limit
o Tiny TSSOP Power Package (1.5W)
30% Smaller than SOT223 (only 1.1mm high)
Ordering Information
PART
TEMP.
RANGE
PIN-
PACKAGE
VOUT (V)†
MAX1793EUE-50 -40°C to +85°C 16 TSSOP-EP* 5.0 or Adj
MAX1793EUE-33 -40°C to +85°C 16 TSSOP-EP* 3.3 or Adj
MAX1793EUE-25 -40°C to +85°C 16 TSSOP-EP 2.5 or Adj
MAX1793EUE-20 -40°C to +85°C 16 TSSOP-EP 2.0 or Adj
MAX1793EUE-18 -40°C to +85°C 16 TSSOP-EP 1.8 or Adj
MAX1793EUE-15 -40°C to +85°C 16 TSSOP-EP 1.5 or Adj
*EP = Exposed Pad
† Contact factory for other preset output voltages.
Typical Operating Circuit
IN
CIN
ON
OFF
NINC OUT
IN MAX1793 OUT
IN OUT
IN OUT
SHDN
RST
SET
GND
OUT
COUT
RESET
OUTPUT
Pin Configuration
TOP VIEW
N.C. 1
IN 2
IN 3
IN 4
IN 5
RST 6
SHDN 7
N.C. 8
MAX1793
16 N.C.
15 OUT
14 OUT
13 OUT
12 OUT
11 SET
10 GND
9 N.C.
TSSOP-EP
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
Low-Dropout, Low IQ, 1A Linear Regulator
Typical Operating Characteristics (continued)
(Circuit of Figure 2, VIN = +5V, V SHDN = VIN, VOUT = +3.3V, TA = +25°C, unless otherwise noted.)
DROPOUT VOLTAGE vs. LOAD CURRENT
300
250
200
150
100
50
0
0 200 400 600 800 1000 1200
LOAD CURRENT (mA)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
60
IOUT = 250mA
50
40
30
20
10
0
0.01
0.1 1
10 100
FREQUENCY (kHz)
1000
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY
10
1
0.1
IOUT = 250mA
0.01
0.01
0.1 1
10 100
FREQUENCY (kHz)
1000
OUTPUT NOISE vs. LOAD CURRENT
140
120
100
80
60
40
20
0
0.001
0.01 0.1
LOAD CURRENT (A)
1
LINE-TRANSIENT RESPONSE
MAX1793 toc11
5V
VIN
3.4V
VOUT
IOUT = 100mA
100µs/div
10mV/div
AC-COUPLED
LOAD-TRANSIENT RESPONSE
MAX1793 toc12
1A
IOUT
100mA
OUTPUT NOISE
MAX1793 toc13
100µV/div
VOUT 20mV/div
AC-COUPLED
40µs/div
4ms/div
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MAX1793.PDF ] | |
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