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參數資料
| 型號： | MC1121 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | 100mA Charge Pump Voltage Converter with Shutdown |
| 中文描述： | 100mA的電荷泵電壓轉換器，具有關斷 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 102K |
| 代理商： | MC1121 |
Semiconductor Components Industries, LLC, 1999
February, 2000 – Rev. 0
1
Publication Order Number:
MC1121/D
The MC1121 is a charge pump converter with 100mA output
current capability. It converts a 2.4V to 5.5V input to a corresponding
negative output voltage. As with all charge pump converters, the
MC1121 uses no inductors saving cost, size, and reducing EMI.
An on–board oscillator operates at a typical frequency of 10kHz (at
VDD = 5V) when the frequency control input (FC) is connected to
ground. The oscillator frequency increases to 200kHz when FC is
connected to VDD, allowing the use of smaller capacitors. Operation at
sub–10kHz frequencies results in lower quiescent current and is
accomplished with the addition of an external capacitor from OSC (pin
7) to ground. The MC1121 can be driven from an external clock
connected OSC. Typical supply current at 10kHz is 50
μ
A, and falls to
less than 1
μ
A when the shutdown input is brought low, whether the
internal or an external clock is used. The MC1121 is available in a
Micro–8 package.
Features
Converts a 2.4V to 5.5V Input Voltage to a Corresponding Negative
Output Voltage (Inverter Mode)
Uses Only 2 Capacitors; No Inductors Required!
High Output Current: 100mA
Selectable Oscillator Frequency: 10kHz to 200kHz
Power–Saving Shutdown Input
Optional High–Frequency Operation Allows Use of Small Capacitors
Low Operating Current (FC = GND): 50
μ
A
Tested Operating Temperature Range: –40
°
C to +85
°
C
Typical Applications
Laptop Computers
Medical Instruments
Disk Drives
μ
P–Based Controllers
Process Instrumentation
FUNCTIONAL BLOCK DIAGRAM
MC1121
+
+C2
C1
OSC
CONTROL
RC
OSCILLATOR
LOGIC
CIRCUITS
SWITCH
MATRIX
–
CAP–
CAP+
Vout
SHDN
FC
OSC
VDD
GND
Micro8
DM SUFFIX
CASE TBD
PRELIMINARY INFORMATION
http://onsemi.com
PIN CONFIGURATION
(Top View)
MC1121
1
2
3
4
8
7
6
5
FC
CAP+
GND
CAP–
VDD
OSC
SHDN
VOUT
Device
Package
Shipping
ORDERING INFORMATION
MC1121DMR2
Micro–8
2500 Tape/Reel
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