QuickView

Technical Documents

Ordering Info

More Information

User Comments (0)

All

Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 260kB) Download   E-Mail

Description

The MAX1556/MAX1556A/MAX1557 are low-operating-current (16µA), fixed-frequency step-down regulators. High efficiency, low-quiescent operating current, low dropout, and minimal (27µA) quiescent current in dropout make these converters ideal for powering portable devices from 1-cell Li-ion or 3-cell alkaline/NiMH batteries. The MAX1556 delivers up to 1.2A; has pinselectable 1.8V, 2.5V, and 3.3V outputs; and is also adjustable. The MAX1557 delivers up to 600mA; has pin-selectable 1V, 1.3V, and 1.5V outputs; and is also adjustable. The MAX1556/MAX1556A/MAX1557 contain a low-on-resistance internal MOSFET switch and synchronous rectifier to maximize efficiency and dropout performance while minimizing external component count. A proprietary topology offers the benefits of a high fixed-frequency operation while still providing excellent efficiency at both light and full loads. A 1MHz PWM switching frequency keeps components small. Both devices also feature an adjustable soft-start to minimize battery transient loading. The MAX1556/MAX1556A/MAX1557 are available in a tiny 10-pin TDFN (3mm x 3mm) package.

An evaluation kit is available:  MAX1556EVKIT  

Key Features		Applications/Uses
Up to 97% Efficiency 95% Efficiency at 1mA Load Current Low 16µA Quiescent Current 1MHz PWM Switching Tiny 3.3µH Inductor Selectable 3.3V, 2.5V, 1.8V, 1.5V, 1.3V, 1.2V, 1.0V, and Adjustable Output 1.2A Guaranteed Output Current (MAX1556/MAX1556A) Voltage Positioning Optimizes Load-Transient Response Low 27µA Quiescent Current in Dropout Low 0.1µA Shutdown Current No External Schottky Diode Required Analog Soft-Start with Zero Overshoot Current Small, 10-Pin, 3mm x 3mm TDFN Package		Cell Phones/Smartphones Digital Cameras and Camcorders Handheld Instruments PDAs and Palmtop Computers Portable MP3 and DVD Players

Diagram

Typical Operating Circuit

Application Notes

Application Note 4266: An Efficiency Primer for Switch-Mode, DC-DC Converter Power Supplies - MAX1556 Application Note 4282: HFRD-33.0 HDMI and DVI, 4 x 4 Crosspoint Switch - MAX1556

Evaluation Kits

MAX1556EVKIT

Design Guides

Power Management for Battery-Powered Equipment (PDF)

Reliability Reports

Reliability Report: MAX1556.pdf MAX1557.pdf Show FIT data for: MAX1556 MAX1557 Request Reliability Report for: MAX1556A

Software/Models

none

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: 1-10 of 10

MAX1556	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1556ETB/V+T			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1556ETB+TG40			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1556ETB+			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1556ETB-T			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1556ETB+T			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1556A	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1556AETB+			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1556AETB+T			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1557	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1557ETB+			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1557ETB-T			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1557ETB+T			Active	TDFN-EP;10 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0003 (PDF) Use pkgcode/variation: T1033+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX1556 MAX1557 New Product Press Release 2004-08-27  Product Ad: Download

Related Products

MAX1920, MAX1921 Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23 MAX1927, MAX1928 Low-Output-Voltage, 800mA, PWM Step-Down DC-DC Converters MAX8560, MAX8561, MAX8562 4MHz, 500mA Synchronous Step-Down DC-DC Converters in Thin SOT and TDFN More Like This: View Product Families for Similar Products See All Step-Down Switching Regulators (264 Products)

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers Parametric Search Applications Help

QuickView

Technical Documents

Ordering Info

More Information

Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

Related Products   Notes and Comments   Evaluation Kits