MC1121 Datasheet, PDF (1/8 Pages) ON Semiconductor – 100mA Charge Pump Voltage Converter with Shutdown

MC1121
100mA Charge Pump Voltage
Converter with Shutdown
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 50µA, and falls to
less than 1µA 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): 50µA
• Tested Operating Temperature Range: –40°C to +85°C
Typical Applications
• Laptop Computers
• Medical Instruments
• Disk Drives
• µP–Based Controllers
• Process Instrumentation
FUNCTIONAL BLOCK DIAGRAM
+–
CAP+ C1 CAP–
http://onsemi.com
Micro8
DM SUFFIX
CASE TBD
PRELIMINARY INFORMATION
PIN CONFIGURATION
(Top View)
FC ₁
8 VDD
CAP+ 2
7 OSC
MC1121
GND 3
6 SHDN
CAP– ₄
5 VOUT
ORDERING INFORMATION
Device
Package
Shipping
MC1121DMR2
Micro–8
2500 Tape/Reel
SHDN
FC
OSC
VDD
GND
OSC
CONTROL
MC1121
RC
OSCILLATOR
SWITCH
MATRIX
LOGIC
CIRCUITS
Vout
C2
+
© Semiconductor Components Industries, LLC, 1999
1
February, 2000 – Rev. 0
Publication Order Number:
MC1121/D