MAX8660, MAX8660A, MAX8661 High-Efficiency, Low-IQ, PMICs with Dynamic Voltage Management for Mobile Applications

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The MAX8660/MAX8661 power management ICs (PMICs) power Intel XScale® applications processors in smart cellular phones, PDAs, Internet appliances, and other portable devices.

Four step-down DC-DC outputs, three linear regulators, and an 8th always-on LDO are integrated with power-management functions. Two dynamically controlled DC-DC outputs power the processor core and internal memory. Two other DC-DC converters power I/O, memory, and other peripherals. Additional functions include on/off control for outputs, low-battery detection, reset output, and a 2-wire I²C serial interface. The MAX8661 functions the same as the MAX8660, except it lacks the REG1 step-down regulator and the REG7 linear regulator.

All step-down DC-to-DC outputs use fast 2MHz PWM switching and tiny external components. They automatically switch from PWM to high-efficiency, light-load operation to reduce operating current and extend battery life. In addition, a forced-PWM option allows low-noise operation at all loads. Overvoltage lockout protects the device against inputs up to 7.5V.

Key Features

Applications/Uses

Optimized for Intel XScale Processors
Protected to 7.5V—Shutdown Above 6.3V
Four Synchronous Step-Down Converters
- REG1, REG2, REG3, REG4
Four LDO Regulators
- REG5, REG6, REG7, REG8
2MHz Switching Allows Small Components
Low, 20µA Deep-Sleep Current
Low-Battery Monitor and Reset Output

	Digital Cameras
	PDAs, Palmtops, and Wireless Handhelds
	Personal Media Players
	Portable GPS Navigation Systems
	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)

I_OUT (A)

Operating Freq. (kHz)

Number of Step-Down Outputs

Number of LDO Outputs

Output Adj. Method

Preset V_OUT (V)

Operating Current, I_CC (max) (mA)

EV-Kit

Package

RoHS Available

Operating Temp. Range (°C)

Price^**

MAX8660

Smartphone/ Portable Media

Step-Down

Monahans

Dynamic V Adj.
Low Battery/ Power OK Output
Reset Output
Serial Interface
Shutdown

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

2.6

0.725

3.3

1.6

2000

Digital
Preset
Resistor

1.8
2.5
2.85
3.0
3.3

0.02

Yes

THIN QFN/40

Yes

-40 to +85

$4.50 @ 1k

MAX8660A

2.5

1.8
2.0
2.5

$4.50 @ 1k

MAX8661

3.3

1.8
2.5
3.3

$3.90 @ 1k

See All Multifunction PMICs (71)

Key Specifications: Switch-Mode DC-DC Power Supplies

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Number of DC-DC Outputs

Preset V_OUT (V)

Digital/VID Programmed Output

I_OUT (A)

Operating Current, I_CC (max) (mA)

Operating Freq. (kHz)

Internal Power Switch(es)

Package

Price^**

MAX8660

Step-Down

2.6

1.8
2.5
2.85
3.0
3.3

Yes

1.6

0.02

2000

Yes

THIN QFN/40

$4.50 @ 1k

MAX8660A

1.8
2.0
2.5

$4.50 @ 1k

MAX8661

1.8
2.5
3.3

$3.90 @ 1k

See All Switch-Mode DC-DC Power Supplies (429)

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.