MAX1702B Triple-Output Power-Management IC for Microprocessor-Based Systems

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The MAX1702B power-management IC supports ARM Powered® devices such as the Intel® PXA210 and PXA250 microprocessors based on the Intel XScale® micro-architecture. These devices include PDAs, third-generation smart cellular phones, internet appliances, automotive in-dash Telematics systems, and other applications requiring substantial computing and multimedia capability at low power.

The MAX1702B integrates three ultra-high-performance power supplies with associated supervisory and management functions. Included is a step-down DC-DC converter to supply 3.3V I/O and peripherals, a step-down DC-DC converter to supply 0.7V to V_IN for the microprocessor core, and a step-down DC-DC converter to supply either 1.8V, 2.5V, or 3.3V to power the memory.

Management functions include automatic power-up sequencing, power-on-reset and manual reset with timer, and two levels of low-battery detection.

The DC-DC converters use fast 1MHz PWM switching, allowing the use of small external components. They automatically switch from PWM mode under heavy loads to skip mode under light loads to reduce quiescent current and maximize battery life. The input voltage range is from 2.6V to 5.5V, allowing the use of three NiMH cells, a single Li+ cell, or a regulated 5V input. The MAX1702B is available in a tiny 6mm x 6mm, 36-pin QFN package and operates over the -40°C to +85°C temperature range.

Key Features

Applications/Uses

Three Regulators in One Package
- Peripherals and I/O Supply: 3.3V at 900mA
- µP Core Supply: 0.7V to V_IN at 400mA
- Memory Supply: 1.8/2.5/3.3V at 800mA
Supports Intel PXA210 and PXA250 Microprocessors
Power-On Reset with Manual Reset Input
Auto Power-Up Sequencing
1MHz PWM Switching Allows Small External Components
Low 5µA Shutdown Current
Tiny 6mm x 6mm, 36-Pin QFN Package

	Automotive In-Dash Telematics Systems
	Internet Appliances and Web-Books
	PDA, Palmtop, and Wireless Handhelds
	Third-Generation Smart Cell Phones

Key Specifications: Multifunction PMICs

Part Number

PMIC for:

Primary Topology

Target Processor or Spec.

Monitor/Control Features

DC-DC/Power Features

V_IN (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. V_OUT (V)

Operating Freq. (kHz)

Number of Step-Down Outputs

Output Adj. Method

Preset V_OUT (V)

Operating Current, I_CC (max) (mA)

EV-Kit

Package

RoHS Available

Operating Temp. Range (°C)

Price^**

MAX1702B

Smartphone/ Portable Media

Step-Down

X-Scale

Low Battery/ Power OK Output
Reset Output
Shutdown

Current Limit
Fixed Frequency/PWM
Internal Power Switches
Soft Start
Synchronous Rectifier

2.7

5.5

0.7

5.5

1000

Preset
Resistor

1.8
2.5
3.3

0.35

Yes

QFN/36
THIN QFN/36

Yes

-40 to +85

$5.00 @ 1k

See All Multifunction PMICs (71)

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.