MAX1763 1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter

Description

The MAX1763 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. This device maintains exceptionally low quiescent supply current (110µA) despite its high 1MHz operating frequency. Small external components and a tiny package make this device an excellent choice for small hand-held applications that require the longest possible battery life.

The MAX1763 uses a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from a wide range of input sources, such as one to three alkaline or NiCd/NiMH cells or a single Lithium-ion (Li+) cell. Maxim's proprietary Idle Mode™ circuitry significantly improves efficiency at light load currents while smoothly transitioning to fixed-frequency PWM operation at higher load currents to maintain excellent full-load efficiency. Low-noise, forced-PWM mode is available for applications that require constant-frequency operation at all load currents. The MAX1763 may also be synchronized to an external clock to protect sensitive frequency bands in communications equipment.

The MAX1763 includes an on-chip linear gain block that can be used to build a high-power external linear regulator or as a low-battery comparator. Soft-start and current limit functions permit optimization of efficiency, external component size, and output voltage ripple.

The MAX1763 is available in a space-saving 16-pin QSOP package or a high-power (1.5W) 16-pin TSSOP-EP package.

Key Features

Applications/Uses

Up to 94% Efficiency
+0.7V to +5.5V Input Voltage Range
1.1V Guaranteed Startup Input Voltage
Up to 1.5A Output
Fixed 3.3V Output or Adjustable (2.5V to 5.5V)
1MHz PWM Synchronous-Rectified Topology
1µA Logic-Controlled Shutdown
Analog Gain Block for Linear-Regulator or Low-Battery Comparator
Adjustable Current Limit and Soft-Start
1.5W TSSOP Package Available

	Digital Cordless Phones
	Handheld Instruments (PDAs, Palmtops)
	Palmtop Computers
	PCS Phones
	Personal Communicators
	Wireless Handsets

Key Specifications: Step-Up Switching Regulators

Part Number

V_IN (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. V_OUT (V)

Preset V_OUT (V)

I_OUT (A)

Output Adj. Method

Operating Current, I_CC (max) (mA)

Number of DC-DC Outputs

Operating Freq. (kHz)

Features

EV-Kit

Package

RoHS Available

Operating Temp. Range (°C)

Price^**

MAX1763

0.7

5.5

2.5

5.5

3.3

1.5

Preset
Resistor

0.2

1000

•	Current Limit

•	Fixed Frequency/ PWM Operation

•	Internal Power Switches

•

Shutdown

•	Soft Start

•	Synchronous Rectifier

Yes

QSOP/16
TSSOP/16

Yes

-40 to +85

$2.95 @ 1k

See All Step-Up Switching Regulators (89)

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

Min. Adjustable V_OUT (V)

Max. Adjustable V_OUT (V)

I_OUT (A)

Operating Current, I_CC (max) (mA)

Operating Freq. (kHz)

Internal Power Switch(es)

Package

Price^**

MAX1763

Step-Up

0.7

5.5

3.3

2.5

5.5

1.5

0.2

1000

Yes

QSOP/16
TSSOP/16

$2.95 @ 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.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-8 of 8

MAX1763

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1763EEE

QSOP;13 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16-1*

-40°C to +85°C

See data sheet

MAX1763EEE-T

QSOP;13 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16-1*

-40°C to +85°C

See data sheet

MAX1763EEE+

QSOP;16 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1763EEE+T

QSOP;16 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1763EUE

TSSOP;16 pin;
Dwg: 21-0108G (PDF)
Use pkgcode/variation: U16E-3*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1763EUE-T

TSSOP;16 pin;
Dwg: 21-0108G (PDF)
Use pkgcode/variation: U16E-3*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1763EUE+

TSSOP;16 pin;
Dwg: 21-0108G (PDF)
Use pkgcode/variation: U16E+3*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1763EUE+T

TSSOP;16 pin;
Dwg: 21-0108G (PDF)
Use pkgcode/variation: U16E+3*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

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