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MAX1605

30V Internal Switch LCD Bias Supply

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1605 boost converter contains a 0.5A internal switch in a tiny 6-pin SOT23 package. The IC operates from a +2.4V to +5.5V supply voltage, but can boost battery voltages as low as 0.8V up to 30V at the output.

The MAX1605 uses a unique control scheme providing the highest efficiency over a wide range of load conditions. An internal 0.5A MOSFET reduces external component count, and a high switching frequency (up to 500kHz) allows for tiny surface-mount components. The current limit can be set to 500mA, 250mA, or 125mA, allowing the user to reduce the output ripple and component size in low-current applications.

Additional features include a low quiescent supply current and a shutdown mode to save power. The MAX1605 is ideal for small LCD panels with low current requirements, but can also be used in other applications. A MAX1605EVKIT evaluation kit (EV kit) is available to help speed up design time.

Data Sheet

Download	Rev 1	(PDF, 248kB)
E-Mail

An evaluation kit is available: MAX1605EVKIT

Key Features

Adjustable Output Voltage up to 30V
20mA at 20V from a Single Li+ Battery
88% Efficiency
Up to 500kHz Switching Frequency
Selectable Inductor Current Limit (125mA, 250mA, or 500mA)
18µA Operating Supply Current
0.1µA Shutdown Current
Avaiable in Two Small Packages
- 6-Pin TDFN
- 6-Pin SOT23

Applications/Uses

Cell Phones/Cordless Phones
Handy Terminals
LCD Bias Generators
Organizers
Palmtop Computers
PDAs and Other Handheld Devices

Key Specifications:

Step-Up Switching Regulators

Part Number

V_IN
(V)

V_OUT
(V)

Max. I_OUT
(A)

Output Adjust. Method

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

min

max

≥

≤

max w/pins

See Notes

MAX1605

2.5

5.5

2.5

0.02

Resistor

500

SOT/6

TDFN-EP/6

$1.66 @1k

See All Step-Up Switching Regulators (91)

Pricing 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.

Diagram

Typical Operating Circuit

Application Notes

Tutorial 817		Using Thermistors in Temperature Tracking Power Supplies
Tutorial 1109		Small, High-Voltage Boost Converters
Application Note 1754		Portable Temperature Monitoring Demystified
Application Note 4510		Simple High-Voltage Supply Features Single IC and Small Size

Reliability Reports

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Ordering Information

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Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1605ETT+			Active	TDFN-EP;6 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0058 (PDF) Use pkgcode/variation: T633+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1605ETT+T			Active	TDFN-EP;6 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0058 (PDF) Use pkgcode/variation: T633+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1605ETT-T			Active	TDFN-EP;6 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0058 (PDF) Use pkgcode/variation: T633-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1605EUT			Active	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6F-6*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1605EUT#G16			Active	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6FH-6*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1605EUT#TG16			Active	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6FH-6*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1605EUT-T			Active	SOT;6 pin;9 mm² Outline Drawing:21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6F-6*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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Evaluation Kits

MAX1605EVKIT

Evaluation Kit for the MAX1605

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