MAX1714, MAX1714A, MAX1714B High-Speed Step-Down Controller for Notebook Computers

Description

The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core or chip-set/RAM supplies in notebook computers.

Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency.

The MAX1714 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous-rectifier MOSFETs.

Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size.

The MAX1714 is intended for CPU core, chipset, DRAM, or other low-voltage supplies as low as 1V. The MAX1714A is available in a 20-pin QSOP package and includes overvoltage protection. The MAX1714B is available in a 16-pin QSOP package with no overvoltage protection. For applications requiring VID compliance or DAC control of output voltage, refer to the MAX1710/MAX1711 data sheet. For a dual output version, refer to the MAX1715 data sheet.

Key Features

Applications/Uses

Ultra-High Efficiency
No Current-Sense Resistor (Lossless I_LIMIT)
Quick-PWM with 100ns Load-Step Response
1% V_OUT Accuracy Over Line and Load
2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output Range
2V to 28V Battery Input Range
200/300/450/600kHz Switching Frequency
Overvoltage Protection (MAX1714A)
Undervoltage Protection
1.7ms Digital Soft-Start
Drives Large Synchronous-Rectifier FETs
2V ±1% Reference Output
Power-Good Indicator

	1.8V and 2.5V I/O Supplies
	Chipset/RAM Supplies as Low as 1V
	CPU Core Supplies
	Notebook Computers

Key Specifications: Step-Down Switching Regulators

Part Number

V_IN (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. V_OUT (V)

Preset 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^**

MAX1714A

5.5

2.5
3.3

Preset
Resistor

0.04

600

•	Adjustable Frequency

•	Current Limit

•	Fixed Frequency/ PWM Operation

•	Output Overvoltage Protection

•

Shutdown

•	Soft Start

•	Synchronous Rectifier

Yes

QSOP/16
QSOP/20

Yes

-40 to +85

$2.43 @ 1k

MAX1714B

•	Adjustable Frequency

•	Current Limit

•	Fixed Frequency/ PWM Operation

•

Shutdown

•	Soft Start

•	Synchronous Rectifier

$2.43 @ 1k

See All Step-Down Switching Regulators (223)

Key Specifications: Switch-Mode DC-DC Power Supplies

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Number of DC-DC Outputs

Preset V_OUT (V)

Digital/VID Programmed Output

Min. Adjustable V_OUT (V)

Max. Adjustable V_OUT (V)

I_OUT (A)

Operating Current, I_CC (max) (mA)

Operating Freq. (kHz)

Internal Power Switch(es)

Package

Price^**

MAX1714A

Step-Down

2.5
3.3

5.5

0.04

600

QSOP/16
QSOP/20

$2.43 @ 1k

MAX1714B

$2.43 @ 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.

Reliability Reports


		Show FIT data for:

		Reliability Report: MAX1714XEEX.pdf MAX1714AEEP.pdf

		Request Reliability Report for:

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

MAX1714A

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1714AEEP

QSOP;20 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E20-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1714AEEP-T

QSOP;20 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E20-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1714AEEP+

QSOP;20 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E20+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1714AEEP+T

QSOP;20 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E20+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1714B

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1714BEEE

QSOP;13 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16-1*

-40°C to +85°C

See data sheet

MAX1714BEEE-T

QSOP;13 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16-1*

-40°C to +85°C

See data sheet

MAX1714BEEE+

QSOP;16 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1714BEEE+T

QSOP;16 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

Notes and Comments

Power Good Indicator, 2V ±1% Reference Output, Drives Large Synchronous Rectifier FETs