MAX1605 30V Internal Switch LCD Bias Supply

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.

Key Features

Applications/Uses

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

	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 (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. 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^**

MAX1605

2.5

5.5

2.5

0.02

Resistor

0.035

500

•	Current Limit

•	Internal Power Switches

•

Shutdown

•	Soft Start

•	True Shutdown

Yes

SOT-23/6
THIN QFN (Dual)/6

Yes

-40 to +85

$1.55 @ 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

Digital/VID Programmed Output

Max. Adjustable V_OUT (V)

I_OUT (A)

Operating Current, I_CC (max) (mA)

Operating Freq. (kHz)

Internal Power Switch(es)

Package

Price^**

MAX1605

Step-Up

2.5

5.5

0.02

0.035

500

Yes

SOT-23/6
THIN QFN (Dual)/6

$1.55 @ 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

MAX1605

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1605EUT#TG16

SOT-23;6 pin;
Dwg: 21-0058I (PDF)
Use pkgcode/variation: U6FH-6*

-40°C to +85°C

RoHS/Lead-Free: RoHS Qualified
Materials Analysis

MAX1605EUT#G16

SOT-23;6 pin;
Dwg: 21-0058I (PDF)
Use pkgcode/variation: U6FH-6*

-40°C to +85°C

RoHS/Lead-Free: RoHS Qualified
Materials Analysis

MAX1605EUT

SOT-23;6 pin;
Dwg: 21-0058I (PDF)
Use pkgcode/variation: U6F-6*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1605EUT-T

SOT-23;6 pin;
Dwg: 21-0058I (PDF)
Use pkgcode/variation: U6F-6*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1605ETT+

TDFN;6 pin;
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T633+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1605ETT

TDFN;6 pin;
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T633-2*

-40°C to +85°C

See data sheet

MAX1605ETT-T

TDFN;6 pin;
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T633-2*

-40°C to +85°C

See data sheet

MAX1605ETT+T

TDFN;6 pin;
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T633+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

More Information

	Topmark Coding: MAX1605
	New Product Press Release 2000-07-18