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General Description

The MAX606/MAX607 are the smallest CMOS, step-up

DC-DC converters available for flash memory and PC

(PCMCIA) cards. They switch at up to 1MHz, permitting

the entire circuit to fit in 0.25in

, yet remain under

1.35mm high to fit Type 1, 2, and 3 card standards.

These devices operate from a 3V to 5.5V input and pro-

vide a ±4% accurate output that is preset to 5V or 12V,

or adjustable from V

to 12.5V. They can provide up to

180mA of output current at 5V.

The MAX606 switches at up to 1MHz and fits Type 1

(thinnest standard) flash memory and PCMCIA cards. It

uses a thin, 1.19mm high, 5µH inductor and small,

0.68µF output capacitors. The entire circuit fits in

0.25in

and is less than 1.35mm high.

The MAX607 switches at up to 500kHz, fitting Type 2

and 3 cards, as well as hand-held devices where

height requirements are not as critical. It uses less

board area than the MAX606, fitting in 0.16in

, but

requires 2.5mm of height. It also has a lower no-load

supply current than the MAX606.

Both devices use a unique control scheme that optimizes

efficiency over all input and output voltages. Other fea-

tures include 1µA logic-controlled shutdown and user-

controlled soft-start to minimize inrush currents.

The MAX606/MAX607 come in 8-pin µMAX and SO

packages. The µMAX package uses half the board

area of a standard 8-pin SO and has a maximum height

of just 1.11mm.

________________________Applications

PCMCIA Cards

Memory Cards

Single PCMCIA Slot Programming

Digital Cameras

Flash Memory Programming

Hand-Held Equipment

____________________________Features

♦ Lowest-Height Circuit (1.35mm max)

♦ ±4% Regulated Output (5V, 12V, or Adjustable)

♦ Up to 180mA Load Current

♦ 1MHz Switching Frequency (MAX606)

♦ 1µA Logic-Controlled Shutdown

♦ 3V to 5.5V Input Voltage Range

♦ Compact 8-Pin µMAX Package

MAX606/MAX607

Low-Profile, 5V/12V or Adjustable, Step-Up

DC-DC Converters for Flash Memory/PCMCIA Cards

________________________________________________________________

Maxim Integrated Products

OUT

GND

PGND

SHDN

MAX606

MAX607

SO/µMAX

TOP VIEW

Pin Configuration

0.68µF 0.68µF

0.68µF

x 2

0.1µF

5µH

MAX606

OUT

SHDN

GND

PGND

ON/OFF

OUTPUT

12V @ 90mA

INPUT

+4.5V TO +5.5V

Typical Operating Circuit

19-0459; Rev 1; 1/99

EVALUATION KIT MANUAL

FOLLOWS DATA SHEET

Ordering Information

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

MAX607EUA -40°C to +85°C 8 µMAX

MAX607ESA -40°C to +85°C 8 SO

MAX606EUA -40°C to +85°C 8 µMAX

MAX606ESA -40°C to +85°C 8 SO

PART TEMP. RANGE PIN-PACKAGE

Summary of content (12 pages)

PAGE 1
9-0459; Rev 1; 1/99 NUAL KIT MA ATION U EET L H A S V E S DATA W O L L FO Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards The MAX606/MAX607 are the smallest CMOS, step-up DC-DC converters available for flash memory and PC (PCMCIA) cards. They switch at up to 1MHz, permitting the entire circuit to fit in 0.25in 2 , yet remain under 1.35mm high to fit Type 1, 2, and 3 card standards. These devices operate from a 3V to 5.
PAGE 2
MAX606/MAX607 Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards ABSOLUTE MAXIMUM RATINGS IN to GND .................................................................-0.3V to +6V LX, OUT to GND .....................................................-0.3V to +15V PGND to GND.....................................................................±0.3V FB to GND ..................................................-0.3V to (VCC + 0.3V) SS, SHDN to GND ............................
PAGE 3
Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards (VIN = 3.3V, GND = PGND = FB = 0V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted.) (Note 2) PARAMETER CONDITIONS Supply Voltage MIN TYP 3.0 Undervoltage Lockout Threshold 2.4 MAX UNITS 5.5 V 2.8 V 3V < VIN < 5V, FB = IN, ILOAD = 0 to 135mA 4.75 5.25 4.5V < VIN < 5.5V, FB = GND, ILOAD = 0 to 90mA 11.4 12.6 FB Regulation Setpoint 0.1V < VFB < (VIN - 0.1V) 1.94 2.
PAGE 4
Typical Operating Characteristics (VIN = 3.3V, TA = +25°C, unless otherwise noted.) MAX606 EFFICIENCY vs. OUTPUT CURRENT 50 40 10 MAX607 (VOUT = 12V) 0 3.0 3.5 4.0 4.5 5.0 5.5 0.01 40 0.1 1 10 100 A: VOUT = 12V, VIN = 3.3V B: VOUT = 5V, VIN = 3.3V C: VOUT = 12V, VIN = 5V D: VOUT = 5V, VIN = 5V 10 0 0.01 1000 0.1 1 10 100 OUTPUT CURRENT (mA) SHUTDOWN QUIESCENT CURRENT vs. TEMPERATURE SWITCH ON-TIME vs. INPUT VOLTAGE SWITCH OFF-TIME vs. OUTPUT VOLTAGE 0.6 0.5 0.4 0.3 0.
PAGE 5
Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards MAX607 MAXIMUM OUTPUT CURRENT vs. INDUCTOR VALUE 300 B 250 200 150 C 100 A: VOUT = 5V, VIN = 3.3V B: VOUT = 12V, VIN = 5V C: VOUT = 12V, VIN = 3.3V 50 0 1x100 A: VOUT = 5V, VIN = 3.3V B: VOUT = 12V, VIN = 5V C: VOUT = 12V, VIN = 3.3V 350 300 A 200 150 C 100 0 1400 A: MAX607 VOUT = 12V B: MAX606 VOUT = 12V C: MAX607 VOUT = 5V D: MAX606 VOUT = 5V 1200 1000 800 B A 600 VIN = 3.
PAGE 6
MAX606/MAX607 Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards Typical Operating Characteristics (continued) (VIN = 3.3V, TA = +25°C, unless otherwise noted.) MAX607 LOAD-TRANSIENT RESPONSE MAX606 LOAD-TRANSIENT RESPONSE OUTPUT 50mV/div OUTPUT 50mV/div 60mA 60mA OUTPUT 20mA/div OUTPUT 20mA/div 10µs/div 20µs/div ILOAD = 5mA to 60mA, OUTPUT = 12V, INPUT = 3.3V ILOAD = 5mA to 60mA, OUTPUT = 12V, INPUT = 3.
PAGE 7
Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards PIN NAME FUNCTION 1 PGND 2 FB Feedback Input. Connect to IN for 5V output, to GND for 12V output, or to a resistive voltage divider between OUT and GND for an adjustable output between IN and 12.5V. 3 SHDN Shutdown Input, Active Low. Connect to GND to power down or to IN for normal operation. Output power FET is held off when SHDN is low.
PAGE 8
MAX606/MAX607 Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards Table 1. Suggested Components for 12V Standard Application Circuit of Figure 2 DESIGNATION MAX606 MAX607 DESIGNATION MAX606 MAX607 L1 5µH inductor Dale ILS-3825-XX 10µH inductor Sumida CLS62-100 L1 5µH, 1A inductor Dale ILS-3825-XX 10µH, 0.7A inductor Sumida CLS62B-100 D1 0.5A, 20V diode Motorola MBR0520L 0.5A, 20V diode Motorola MBR0520L D1 0.5A, 20V diode Motorola MBR0520L 0.
PAGE 9
Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards MAX606/MAX607 IN TIMING CIRCUIT tOFF tON EN ON INH UNDERVOLTAGE LOCKOUT CONTROL LOGIC LX CURRENT-LIMIT COMPARATOR OFF INTERNAL POWER 1Ω SWITCH DRIVER RLIM PGND SS OUT VREF MAX606 MAX607 REF SHDN ERROR COMPARATOR INT/EXT FB FB DUAL MODE 5V/12V Figure 3. Functional Diagram The on/off times are determined by the input and output voltages: tON = K / VIN tOFF = 0.
PAGE 10
MAX606/MAX607 Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards INPUT IN LX OUTPUT 10pF MAX606 MAX607 OUT R1 FB GND PGND Undervoltage Lockout R2 VOUT = VREF VREF = 2V ( R1 +1 R2 ) Figure 4. Adjustable Output Voltage When FB is connected to IN or GND, an internal voltage divider is configured to produce a predetermined output. However, when the voltage at FB is between 0.1V above ground and 0.1V below VIN, the device is in the adjustable output mode.
PAGE 11
Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards Capacitor Selection Output Filter Capacitor The output voltage ripple is a function of the output capacitor’s equivalent series resistance (ESR) and capacitance. For best performance, use ceramic capacitors. Higher-ESR capacitors, such as tantalums, will cause excessive ripple. See Table 3 for a list of component suppliers.
PAGE 12
________________________________________________________Package Information 8LUMAXD.