NCP1422EVB ON Semiconductor, NCP1422EVB Datasheet

NCP1422EVB

Manufacturer Part Number

NCP1422EVB

Description

EVAL BOARD FOR NCP1422

Manufacturer

ON Semiconductor

Datasheets

1.NCP1422MNR2G.pdf (14 pages)

2.NCP1422EVB.pdf (1 pages)

Specifications of NCP1422EVB

Design Resources

NCP1422 EVB BOM NCP1422EVB Gerber Files NCP1422EVB Schematic

Main Purpose

DC/DC, Step Up

Outputs And Type

1, Non-Isolated

Voltage - Output

3.3 ~ 5 V

Current - Output

800mA

Voltage - Input

2.5V, 3.6V

Regulator Topology

Boost

Frequency - Switching

1.2MHz

Board Type

Fully Populated

Utilized Ic / Part

NCP1422

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

For Use With/related Products

NCP1422

Other names

NCP1422EVBOS

Current page: 1 of 14
Download datasheet (135Kb)

NCP1422

800 mA Sync−Rect PFM

Step−Up DC−DC Converter

with True−Cutoff and

Ring−Killer

switching converter IC specially designed for battery−operated

hand−held electronic products up to 800 mA loading. It integrates

Sync−Rect to improve efficiency and to eliminate the external

Schottky Diode. High switching frequency (up to 1.2 MHz) allows

for a low profile, small−sized inductor and output capacitor to be

used. When the device is disabled, the internal conduction path from

LX or BAT to OUT is fully blocked and the OUT pin is isolated from

the battery. This True−Cutoff function reduces the shutdown current

to typically only 50 nA. Ring−Killer is also integrated to eliminate

the high−frequency ringing in discontinuous conduction mode. In

addition to the above, Low−Battery Detector, Logic−Controlled

Shutdown, Cycle−by−Cycle Current Limit and Thermal Shutdown

provide value−added features for various battery−operated

applications. With all these functions on, the quiescent supply

current is typically only 8.5 mA. This device is available in the

compact and low profile DFN−10 package.

Features

•

Typical Applications

•

February, 2006 − Rev. 3

NCP1422 is a monolithic micropower high−frequency step−up

typically 50 nA

Supply 2.5 mA Loading Current when V

to 3.0−5.0 V or one Lithium−ion cells to 5.0 V

Pb−Free Package is Available*

High Efficiency: 94% for 3.3 V Output at 200 mA from 2.5 V Input

High Switching Frequency, up to 1.2 MHz (not hitting current limit)

Output Current up to 800 mA at V

True−Cutoff Function Reduces Device Shutdown Current to

Anti−Ringing Ring−Killer for Discontinuous Conduction Mode

High Accuracy Reference Output, 1.20 V $1.5% @ 25°C, can

Low Quiescent Current of 8.5 mA

Integrated Low−Battery Detector

Open Drain Low−Battery Detector Output

1.0 V Startup at No Load Guaranteed

Output Voltage from 1.5 V to 5.0 V Adjustable

1.5 A Cycle−by−Cycle Current Limit

Multi−Function Logic−Controlled Shutdown Pin

On Chip Thermal Shutdown with Hysteresis

Personal Digital Assistants (PDA)

Handheld Digital Audio Products

Camcorders and Digital Still Cameras

Hand−held Instruments

Conversion from one to two Alkaline, NiMH, NiCd Battery Cells

White LED Flash for Digital Cameras

88% for 3.3 V Output at 500 mA from 2.5 V Input

= 2.5 V and V

OUT

> 3.3 V

OUT

= 3.3 V

NCP1422MNR2

NCP1422MNR2G

†For information on tape and reel specifications,

*For additional information on our Pb−Free strategy

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

and soldering details, please download the

ON Semiconductor Soldering and Mounting

Techniques Reference Manual, SOLDERRM/D.

Device

LBI/EN

1422 = Device Code

(Note: Microdot may be in either location)

LBO

REF

ORDERING INFORMATION

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

PIN CONNECTIONS

http://onsemi.com

MN SUFFIX

CASE 485C

(Pb−Free)

(Top View)

Package

DFN−10

Publication Order Number:

3000 Tape & Reel

Shipping†

MARKING

DIAGRAM

OUT

GND

BAT

NCP1422/D

ALYWG

1422

Related parts for NCP1422EVB

NCP1422EVB Summary of contents

Page 1

... Tape and Reel Packaging Specifications Brochure, BRD8011/D. *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Publication Order Number: NCP1422/D 1422 ...

Page 2

V Chip Enable − PFM REF Voltage Reference 5 1. LBI/EN − 2 NCP1422 ZLC + − TRUE CUTOFF CONTROL CONTROL LOGIC _ZCUR _TSDON V DD _MSON _MAINSW2ON GND _CEN _PFM ...

Page 3

PIN FUNCTION DESCRIPTIONS Pin Symbol 1 FB Output Voltage Feedback Input. 2 LBI/EN Low−Battery Detector Input and IC Enable. With this pin pulled down below 0.5 V, the device is disabled and enters the shutdown mode. 3 LBO Open−Drain Low−Battery ...

Page 4

ELECTRICAL CHARACTERISTICS otherwise noted.) Characteristic Operating Voltage Output Voltage Range Reference Voltage = 200 nF, T OUT LOAD REF Reference Voltage = ...

Page 5

TYPICAL OPERATING CHARACTERISTICS 1.220 V = 3.3 V OUT 1.210 = OUT = 1 REF T = 25_C A 1.200 1.190 1.180 1 10 ...

Page 6

TYPICAL OPERATING CHARACTERISTICS 3.3 V OUT − OUT T = 25_C A − 100 OUTPUT LOADING CURRENT, I Figure ...

Page 7

TYPICAL OPERATING CHARACTERISTICS = 50 mA 5 OUT LOAD Upper Trace: Output Voltage Ripple, 20 mV/Division Lower Trace: Voltage at Lx pin, 1.0 V/Division Figure 14. Discontinuous ...

Page 8

TYPICAL OPERATING CHARACTERISTICS 100 1 NCP1422 5.0 V OUT OUT T = 25_C ...

Page 9

If the regulator is operating in Continuous Conduction Mode (CCM turned OFF just before M1 is supposed again. If the regulator is operating in Discontinuous Conduction Mode ...

Page 10

Output Voltage Setting A typical application circuit is shown in Figure 23. The output voltage of the converter is determined by the external feedback network comprised of R1 and R2. The relationship is given by OUT ...

Page 11

200 k Shutdown Open Drain Input Low Battery Open Drain Output *Optional Figure 23. Typical Application Schematic for 2 Alkaline Cells Supply Switching mode converter design is considered a complicated process. Selecting the right ...

Page 12

From the previous calculations, you need at least 18. order to achieve the specified ripple level at the conditions stated. Practically, a capacitor that is one level larger is used to accommodate factors not taken into account in ...

Page 13

... BOTTOM VIEW 0.05 C NOTE 3 10X 0.5651 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. NCP1422 PACKAGE DIMENSIONS DFN10 3mm, 0.5mm Pitch CASE 485C−01 ISSUE EDGE OF PACKAGE L1 ...

Page 14

... Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com NCP1422 N. American Technical Support: 800−282−9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone: 81−3−5773−3850 http://onsemi.com 14 ON Semiconductor Website: http://onsemi ...

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