MAX1902ETJ datasheet, PDF - EEWORLD Datasheet

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MAX1902ETJ: Description0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32; CategoryPower/power management The power supply circuit; File Size530KB，33 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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MAX1902ETJ Overview

0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32

MAX1902ETJ Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Maxim
Parts packaging code	QFN
package instruction	5 X 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32
Contacts	32
Reach Compliance Code	_compli
ECCN code	EAR99
Analog Integrated Circuits - Other Types	DUAL SWITCHING CONTROLLER
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	30 V
Minimum input voltage	4.2 V
Nominal input voltage	15 V
JESD-30 code	S-XQCC-N32
JESD-609 code	e0
length	5 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	32
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	0.2 A
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Encapsulate equivalent code	LCC28,.2SQ,20
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	245
Certification status	Not Qualified
Maximum seat height	0.8 mm
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	550 kHz
technology	BICMOS
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn85Pb15)
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED
width	5 mm

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19-2224; Rev 3; 12/03

500kHz Multi-Output, Low-Noise Power-Supply

Controllers for Notebook Computers

General Description

The MAX1901/MAX1902/MAX1904 are buck-topology,

step-down, switch-mode, power-supply controllers that

generate logic-supply voltages in battery-powered sys-

tems. These high-performance, dual/triple-output devices

include on-board power-up sequencing, power-good sig-

naling with delay, digital soft-start, secondary winding

control, low dropout circuitry, internal frequency-compen-

sation networks, and automatic bootstrapping.

Up to 97% efficiency is achieved through synchronous

rectification and Maxim’s proprietary Idle Mode™ control

scheme. Efficiency is greater than 80% over a 1000:1

load-current range, which extends battery life in system

suspend or standby mode. Excellent dynamic response

corrects output load transients within five clock cycles.

Strong 1A on-board gate drivers ensure fast external N-

channel MOSFET switching.

These devices feature a logic-controlled and synchroniz-

able, fixed-frequency, pulse-width modulation (PWM)

operating mode. This reduces noise and RF interference

in sensitive mobile communications and pen-entry appli-

cations. Asserting the

SKIP

pin enables fixed-frequency

mode, for lowest noise under all load conditions.

The MAX1901/MAX1902/MAX1904 include two PWM reg-

ulators, adjustable from 2.5V to 5.5V with fixed 5.0V and

3.3V modes. All these devices include secondary feed-

back regulation, and the MAX1902 contains a 12V/120mA

linear regulator. The MAX1901/MAX1904 include a sec-

ondary feedback input (SECFB), plus a control pin

(STEER) that selects which PWM (3.3V or 5V) receives the

secondary feedback signal. SECFB provides a method

for adjusting the secondary winding voltage regulation

point with an external resistor divider, and is intended to

aid in creating auxiliary voltages other than fixed 12V.

The MAX1901/MAX1902 contain internal output overvolt-

age and undervoltage protection features.

Features

97% Efficiency

4.2V to 30V Input Range

2.5V to 5.5V Dual Adjustable Outputs

Selectable 3.3V and 5V Fixed or Adjustable

Outputs (Dual Mode™)

12V Linear Regulator

Adjustable Secondary Feedback

(MAX1901/MAX1904)

5V/50mA Linear Regulator Output

Precision 2.5V Reference Output

Programmable Power-Up Sequencing

Power-Good (RESET) Output

Output Overvoltage Protection

(MAX1901/MAX1902)

Output Undervoltage Shutdown

(MAX1901/MAX1902)

333kHz/500kHz Low-Noise, Fixed-Frequency

Operation

Low-Dropout, 98% Duty-Factor Operation

2.5mW Typical Quiescent Power (12V input, both

SMPSs on)

4µA Typical Shutdown Current

MAX1901/MAX1902/MAX1904

Ordering Information

PART

MAX1901EAI

MAX1901ETJ

MAX1902EAI

MAX1902ETJ

MAX1904EAI

MAX1904ETJ

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

28 SSOP

32 Thin QFN 5mm x 5mm

28 SSOP

32 Thin QFN 5mm x 5mm

28 SSOP

32 Thin QFN 5mm x 5mm

________________________Applications

Notebook and Subnotebook Computers

PDAs and Mobile Communicators

Desktop CPU Local DC-DC Converters

3.3V

INPUT

5V (RTC)

Functional Diagram

12V

LINEAR

12V

LINEAR

3.3V

SMPS

Idle Mode is a trademark of Maxim Integrated Products, Inc.

Dual Mode is a trademark of Maxim Integrated Products, Inc.

Pin Configurations appear at end of data sheet.

ON/OFF

POWER-UP

SEQUENCE

POWER-

GOOD

RESET

________________________________________________________________

Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX1902ETJ Related Products

	MAX1902ETJ	MAX1901-MAX1904	MAX1902	MAX1904	MAX1901
Description	0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32	0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32	0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32	0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32	0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32
control mode	CURRENT-MODE	PEAK current	PEAK current	PEAK current	PEAK current
Control Technology	PULSE WIDTH MODULATION	Pulse width MODULATION	Pulse width MODULATION	Pulse width MODULATION	Pulse width MODULATION
Number of functions	1	1	1	1	1
Number of terminals	32	32	32	32	32
Maximum operating temperature	85 °C	85 Cel	85 Cel	85 Cel	85 Cel
Minimum operating temperature	-40 °C	-40 Cel	-40 Cel	-40 Cel	-40 Cel
Maximum output current	0.2 A	0.2000 A	0.2000 A	0.2000 A	0.2000 A
surface mount	YES	Yes	Yes	Yes	Yes
Switch configuration	PUSH-PULL	push-pull	push-pull	push-pull	push-pull
Maximum switching frequency	550 kHz	550 kHz	550 kHz	550 kHz	550 kHz
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	NO LEAD	NO	NO	NO	NO
Terminal location	QUAD	Four	Four	Four	Four
Rated input voltage	-	15 V	15 V	15 V	15 V
Maximum limit input voltage	-	30 V	30 V	30 V	30 V
Minimum limit input voltage	-	4.2 V	4.2 V	4.2 V	4.2 V
Processing package description	-	5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32	5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32	5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32	5 × 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32
state	-	ACTIVE	ACTIVE	ACTIVE	ACTIVE
Craftsmanship	-	BICMOS	BICMOS	BICMOS	BICMOS
packaging shape	-	SQUARE	SQUARE	SQUARE	SQUARE
Package Size	-	Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Terminal spacing	-	0.5000 mm	0.5000 mm	0.5000 mm	0.5000 mm
terminal coating	-	tin lead	tin lead	tin lead	tin lead
Packaging Materials	-	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Analog IC other types	-	Dual switch controller	Dual switch controller	Dual switch controller	Dual switch controller

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