Datasheet > CS2001/D

CS2001/D

更新时间： 2022-01-19 23:54:00

品牌	Logo	应用领域
其他 - ETC		稳压器开关
页数	文件大小	规格书
8页	77K
描述
1.2A Switching Regulator， and 5.0 V 100mA Linear Regulator with RESETbar

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CS2001/D 数据手册

CS2001

1.2 A Switching Regulator,

and 5.0 V, 100 mA Linear

Regulator with RESET

The CS2001 is a smart power supply ASIC utilized in automotive

airbag systems. It contains a current–mode switching regulator with a

1.2 A on–chip switch and a 5.0 V, 100 mA linear regulator. The linear

output capacitor must be 3.3 µF or greater with an ESR in the range of

100 mΩ to 1.0 Ω. If the ESR of the cap is less than 100 mΩ, a series

resistor must be used. The switcher can be configured in either a boost

or flyback topology. The boost topology produces energy reserve

voltage VER which is externally adjustable (25 V maximum) through

http://onsemi.com

SO–20L

DWF SUFFIX

CASE 751D

MARKING DIAGRAM

the resistor divider connected to the V pin. In the event of fault

conditions that produce V either open or shorted, the switcher is

shut down.

Under normal operating conditions (V

CS2001

> 8.0 V), the current

BAT

AWLYYWW

loading on the linear regulator is directed through V . A low battery

BAT

or loss of battery condition switches the supply for the linear regulator

from V

to VER and shuts down the switcher using the ASIC’s

BAT

internal “smartswitch.” This switchover feature minimizes the power

dissipation in both the linear and switcher output devices and saves the

cost of using a larger inductor.

= Assembly Location

WL, L = Wafer Lot

YY, Y = Year

WW, W = Work Week

The NERD (No Energy Reserve Detected) pin is a dual function

output. If V

is not in regulation, it provides a Power On Reset

OUT

function whose time interval is externally adjustable with the

capacitor. This interval can be seen on the RESETB pin, which allows

for clean power–up and power–down of the microprocessor. Once

PIN CONNECTIONS

VER

OUT

is in regulation, the logic level of the NERD output (usually

GND1

GND2

GND3

GND4

RESETB

NERD

GND8

GND7

GND6

GND5

BAT

low) indicates to the microprocessor whether or not the VER pin is

connected.

A switched–capacitor voltage tripler accepts input voltage VER and

produces output voltage V

(typically VER + 8.0 V). This voltage

CHG

is used in the system to drive high–side FETs.

This part is capable of withstanding a 50 V peak transient voltage.

The linear regulator will not shut down during this event.

CHG

BIAS

SWSD

COMP

PUMP

Features

ORDERING INFORMATION

• Linear Regulator 5.0 V ±2% @ 100 mA

• Switching Regulator 1.2 A Peak Internal Switch

• Voltage Tripler

• Smart Functions

Device

Package

Shipping

37 Units/Rail

CS2001YDWF20

CS2001YDWFR20

SO–20L

1000 Tape & Reel

– Smartswitch

– RESET

– Energy Reserve Status

• Protection

– Overtemperature

– Current Limit

– 50 V Peak Transient Capability

• Internally Fused Leads in SO–20L Package

Semiconductor Components Industries, LLC, 2001

Publication Order Number:

December, 2000 – Rev. 5

CS2001/D

12 3 4 5 6 7 8

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