MAX662AMJA Maxim Integrated Products, MAX662AMJA Datasheet

MAX662AMJA

Manufacturer Part Number

MAX662AMJA

Description

Charge Pumps

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX662ACPA.pdf (6 pages)

Specifications of MAX662AMJA

Function

Step Up

Output Voltage

12 V

Output Current

30 mA

Maximum Operating Temperature

+ 125 C

Package / Case

CDIP-8

Minimum Operating Temperature

- 55 C

Mounting Style

Through Hole

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

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The MAX662A is a regulated +12V, 30mA-output, charge-

pump DC-DC converter. It provides the necessary +12V

±5% output to program byte-wide flash memories, and

requires no inductors to deliver a guaranteed 30mA out-

put from inputs as low as 4.75V. It fits into less than 0.1in

of board space. The MAX662A is a pin-compatible

upgrade to the MAX662, and is recommended for new

designs. The MAX662A offers lower quiescent and shut-

down currents, and guarantees the output current over all

temperature ranges.

The MAX662A is the first charge-pump boost converter to

provide a regulated +12V output. It requires only a few

inexpensive capacitors, and the entire circuit is complete-

ly surface-mountable.

A logic-controlled shutdown pin that interfaces directly

with microprocessors reduces the supply current to only

0.5µA. The MAX662A comes in 8-pin narrow SO and DIP

packages.

For higher-current flash memory programming solutions,

refer to the data sheets for the MAX734 (120mA output

current, guaranteed) and MAX732 (200mA output cur-

rent, guaranteed) PWM, switch-mode DC-DC converters.

Or, refer to the MAX761 data sheet for a 150mA, PFM

switch-mode DC-DC converter that operates from inputs

as low as 2V.

________________________Applications

19-0253; Rev 1; 8/94

Call toll free 1-800-998-8800 for free samples or literature.

__________Typical Operating Circuit

_______________General Description

0.22 F

4.75V TO 5.5V

INPUT

+12V Flash Memory Programming Supplies

Compact +12V Op-Amp Supplies

Switching MOSFETs in Low-Voltage Systems

Dual-Output +12V and +20V Supplies

4.7 F

C1-

SHDN

C1+

MAX662A

GND

________________________________________________________________ Maxim Integrated Products

C2+

OUT

C2-

0.22 F

12V ±5%

OUTPUT

30mA

4.7 F

MEMORY

FLASH

+12V, 30mA Flash Memory

____________________________Features

* Dice are tested at T

** Contact factory for availability and processing to MIL-STD-883.

______________Ordering Information

MAX662ACPA

MAX662ACSA

MAX662AC/D

MAX662AEPA

MAX662AESA

MAX662AMJA

__________________Pin Configuration

Regulated +12V ±5% Output Voltage

4.5V to 5.5V Supply Voltage Range

Fits in 0.1in

Guaranteed 30mA Output

No Inductor—Uses Only 4 Capacitors

185µA Quiescent Current

Logic-Controlled 0.5µA Shutdown

8-Pin Narrow SO and DIP Packages

TOP VIEW

Programming Supply

PART

C1+

C2+

C1-

C2-

-40°C to +85°C

-55°C to +125°C

TEMP. RANGE

0°C to +70°C

= +25°C.

MAX662A

DIP/SO

PIN-PACKAGE

8 Plastic DIP

8 SO

Dice*

8 Plastic DIP

8 SO

8 CERDIP**

SHDN

GND

OUT

Related parts for MAX662AMJA

MAX662AMJA Summary of contents

Page 1

... Logic-Controlled 0.5µA Shutdown 8-Pin Narrow SO and DIP Packages ______________Ordering Information PART TEMP. RANGE MAX662ACPA MAX662ACSA MAX662AC/D MAX662AEPA -40°C to +85°C MAX662AESA -40°C to +85°C MAX662AMJA -55°C to +125°C * Dice are tested Contact factory for availability and processing to MIL-STD-883. __________________Pin Configuration TOP VIEW C1 C1+ 2 ...

Page 2

... SUPPLY VOLTAGE (V) 2 _______________________________________________________________________________________ Operating Temperature Ranges + 0.3V) MAX662AC_A .....................................................0°C to +70°C CC MAX662AE_A ..................................................-40°C to +85°C MAX662AMJA................................................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300° unless otherwise noted.) MIN MAX CONDITIONS 0mA ≤ I ≤ ...

Page 3

... OUT when in shutdown mode. 7 GND Ground Active-high CMOS-logic level Shutdown Input. SHDN is internally pulled Connect to GND for CC 8 SHDN normal operation. In shutdown mode, the charge pumps are turned off and OUT CC _______________________________________________________________________________________ +12V, 30mA Flash Memory Programming Supply SUPPLY VOLTAGE, 2V/div ...

Page 4

... Regulation is provid pulse-skipping scheme that monitors the output voltage level and turns on the charge pumps when the output voltage begins to droop. Figure 1 shows a simplified block diagram of the MAX662A. When the S1 switches are closed and the ...

Page 5

Table 1. Capacitor Suppliers Supplier Phone Number Murata Erie (814) 237-1431 (603) 224-1961 Sprague Electric (207) 324-4140 *Note: (SM) denotes surface-mount component, (TH) denotes through-hole component. 3 C2- C1+ C2 0.22 F MAX662A 4 C2+ C1 4.75V ...

Page 6

Flash Memory Programming Supply 3 C2- C1+ 0.22 F MAX662A 4 C2+ C1 SHDN GND 12V 1N5818 OUTPUT 6 20V V V OUT CC OUTPUT 1N5818 Figure 4. +12V and +20V Dual ...

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