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MAX1793

Low-Dropout, Low-I_Q, 1A Linear Regulator

1A LDO Has Only 210mV Dropout Voltage, Fits in 1.7W Package, Which Is 30% Smaller Than SOT23

Data Sheet

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Overview

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.

MAX1793: Typical Operating Circuit

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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 115µV_RMS Output Noise
Thermal-Overload Protection
Output Current Limit
Tiny TSSOP Power Package (1.5W) 30% Smaller than SOT223 (only 1.1mm high)

Applications/Uses

Docking Stations
Notebook Computers
PDAs
USB Hubs
Wireless Base Stations

Parametric Specs

Part Number

Regulators

V_IN
(V)

Preset V_OUT
(V)

Adj. V_OUT
(V)

V_DROPOUT @Rated I_LOAD
(V)

Rated I_LOAD
(mA)

I_CC
(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

Budgetary
Price

min

max

min

max

typ

max

typ

nom

See Notes

MAX1793

2.5

5.5

2.5

3.3

1.25

0.21

1000

200

115

Vout-6%

-40 to +85

TSSOP/16

$1.50 @1k

See All Linear Regulators (144)

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

Quality and Environmental Data

Product Reliability Reports: MAX1793.pdf
Lead-Free Package Tin (Sn) Whisker Reports

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >