参数资料
| 型号： | CS2001YDWFR20 |
| 厂商： | ON Semiconductor |
| 文件页数： | 1/7页 |
| 文件大小： | 0K |
| 描述： | IC REG BST FLYBK ADJ 1.2A 20SOIC |
| 产品变化通告： | Product Obsolescence 30/Dec/2003 |
| 标准包装： | 1,000 |
| 类型： | 升压，反激式 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 4.9 V ~ 5.1 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 150kHz |
| 电流 - 输出： | 1.2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-SOIC |
| 其它名称： | CS2001YDWFR20OS |
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
http://onsemi.com
output capacitor must be 3.3 μ F or greater with an ESR in the range of
100 m Ω to 1.0 Ω . If the ESR of the cap is less than 100 m Ω , a series
resistor must be used. The switcher can be configured in either a boost
or flyback topology. The boost topology produces energy reserve the
resistor divider connected to the V FB pin. In the event of fault voltage
VER which is externally adjustable (25 V maximum) through
conditions that produce V FB either open or shorted, the switcher is
shut down.
Under normal operating conditions (V BAT > 8.0 V), the current
loading on the linear regulator is directed through V BAT . A low battery
or loss of battery condition switches the supply for the linear regulator
20
SO ? 20L
DWF SUFFIX
CASE 751D
1
MARKING DIAGRAM
20
CS2001
AWLYYWW
from V BAT to VER and shuts down the switcher using the ASIC’s
internal smart switch. This switchover feature minimizes the power
dissipation in both the linear and switcher output devices and saves the
cost of using a larger inductor.
The NERD (No Energy Reserve Detected) pin is a dual function
A
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1
= Assembly Location
= Wafer Lot
= Year
= Work Week
output. If V OUT is not in regulation, it provides a Power On Reset
function whose time interval is externally adjustable with the
capacitor. This interval can be seen on the RESETB pin, which allows
PIN CONNECTIONS
for clean power ? up and power ? down of the microprocessor. Once
V OUT is in regulation, the logic level of the NERD output (usually
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 CHG (typically VER + 8.0 V). This voltage
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.
VER
V BAT
V FB
GND1
GND2
GND3
GND4
V SW
SWSD
COMP
1
20
V OUT
RESETB
NERD
GND8
GND7
GND6
GND5
V CHG
I BIAS
C PUMP
Features
? Linear Regulator 5.0 V ± 2% @ 100 mA
? Switching Regulator 1.2 A Peak Internal Switch
? Voltage Tripler
? Smart Functions
? Smartswitch
? RESET
? Energy Reserve Status
? Protection
? Overtemperature
? Current Limit
? 50 V Peak Transient Capability
? Internally Fused Leads in SO ? 20L Package
ORDERING INFORMATION
Device Package Shipping
CS2001YDWF20 SO ? 20L 37 Units/Rail
CS2001YDWFR20 SO ? 20L 1000 Tape & Reel
? Semiconductor Components Industries, LLC, 2011
May, 2011 ? Rev. 6
1
Publication Order Number:
CS2001/D
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