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MAX1793
Low-Dropout, Low-IQ, 1A Linear Regulator
1A LDO Has Only 210mV Dropout Voltage, Fits in 1.7W Package, Which Is 30% Smaller Than SOT23
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Status
Active: In Production.
Description
The MAX1793 low-dropout linear regulator (LDO) operates from +2.5V to +5.5V and delivers a guaranteed 1A load current with a low 210mV dropout. The high-accuracy (±1%) output voltage is preset at an internally trimmed voltage (see the Ordering Information in the full data sheet) 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-circuit 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.
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Data Sheet
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Key Features
- Guaranteed 1A Output Current
- Low 210mV Dropout at 1A
- 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
- Reset Output (4ms Delay)
- Low 125µA Ground Current
- 0.1µA Shutdown
- Low 115µVRMS Output Noise
- Thermal-Overload Protection
- Output Current Limit
- Tiny TSSOP Power Package (1.5W) 30% Smaller than SOT223 (only 1.1mm high)
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Applications/Uses
- Docking Stations
- Notebook Computers
- PDAs
- USB Hubs
- Wireless Base Stations
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Key Specifications:
| Linear Regulators |
| Part Number |
Regulators |
VIN
(V) |
VIN
(V) |
Preset VOUT
(V) |
Adj. VOUT
(V) |
Adj. VOUT
(V) |
VDROPOUT @Rated ILOAD
(V) |
Rated ILOAD
(mA) |
ICC
(µA) |
Output Voltage Noise
(µV RMS) |
Ref. Bypass |
Low Batt./ Pwr. Fail Out |
POK/Reset Thresh.
(V) |
Watchdog |
Reverse Batt. Protect. |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
min |
max |
typ |
max |
typ |
nom |
max w/pins |
See Notes |
| MAX1793 |
1 |
2.5 |
5.5 |
|
1.25 |
5 |
0.21 |
1000 |
200 |
115 |
No |
No |
Vout-6% |
No |
No |
-40 to +85 |
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33.2 |
$1.50 @1k |
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See All Linear Regulators (149)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Didn't Find What You Need?
Information Index
Document Ref.: 19-1654
Rev 3;
2012-02-09
This page last modified: 2012-02-09
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