MAX1793 Low-Dropout, Low-IQ, 1A Linear Regulator

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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 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-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.

Key Features

Applications/Uses

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)

	Docking Stations
	Notebook Computers
	PDAs
	USB Hubs
	Wireless Base Stations

Key Specifications: Linear Regulators

Part Number

Regulators per Pkg.

Min. V_IN (V)

Max. V_IN (V)

Preset V_OUT (V)

Min. Adjustable V_OUT (V)

Max. Adjustable V_OUT (V)

Typ. V_DROPOUT@ Rated I_LOAD (V)

Rated I_LOAD (mA)

Max. I_CC (µA)

Low Battery/ Power Fail Output

POK/ Reset Output

POK/ Reset Output Type

Nominal POK/Reset Threshold (V)

Min. Reset Pulse Width (ms)

Watchdog

Reverse Battery Protection

Industry Qualified

Package

Operating Temp. Range (°C)

Price^**

MAX1793

2.5

5.5

2.5
3.3

1.25

0.21

1,000

200

Reset

Open Drain Active Low

Vout-6%

1.5

Automotive - AECQ100
Automotive - General

TSSOP/16

-40 to +85

$1.50 @ 1k

See All Linear Regulators (141)

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.