MC1121 Shutdown Datasheet

MC1121 Datasheet, PDF, Equivalent


Part Number

MC1121

Description

100mA Charge Pump Voltage Converter with Shutdown

Manufacture

ON Semiconductor

Total Page 8 Pages
Datasheet
Download MC1121 Datasheet


MC1121
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
February, 2000 – Rev. 0
1
Publication Order Number:
MC1121/D

MC1121
MC1121
PIN DESCRIPTION
Pin No.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ3
4
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ5
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ6
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ7
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ8
Symbol
FC
CAP+
GND
CAP–
VOUT
SHDN
OSC
VDD
Description
Frequency control for internal oscillator, FC = open, FOSC = 10kHz typ; FC = VDD, FOSC = 200kHz
typ, FC has no effect when OSC pin is driven externally
Charge–pump capacitor, positive terminal
Power–supply ground input
Charge–pump capacitor, negative terminal
Output, negative voltage
Shutdown
Oscillator control input. An external capacitor can be added to slow the oscillator. Take care to
minimize stray capacitance. An external oscillator also may be connected to overdrive OSC
Power–supply positive voltage input
ABSOLUTE MAXIMUM RATINGS*
Parameter
VDD Supply Voltage
Operating Temperature Range
OSC, FC, SHDN Input Voltage
Output Short Circuit Duration
Storage Temperature Range
Package Power Dissipation (TA 70°C) Micro8
Derate by 4mW/°C for TA > 70°C
Lead Temperature (Soldering, 10 Seconds)
* Maximum Ratings are those values beyond which damage to the device may occur.
Value
6.0
–40 to +85
–0.3 to (VDD + 0.3)
10
–65 to +150
333
+300
Unit
V
°C
V
Sec
°C
mW
°C
ELECTRICAL CHARACTERISTICS (TA = –40°C to +85°C, VDD = 5V ±10% COSC = OPEN, C1, C2 = 10µF, FC = VDD,
SHDN = VIH, unless otherwise noted. Typical values are at TA = 25°C.)
Symbol
Characteristic
Min Typ Max Unit
IDD Active Supply Current
RL = Open, FC = Open or GND
RL = Open, FC = VDD
— 50 100 µA
— 0.6 1.0 mA
IDD(SHDN)
Shutdown Supply Current (SHDN = 0V)
— 0.2 1.0 µA
VDD
Supply Voltage
2.4 — 5.5 V
VIH SHDN Logic High Input Voltage
VDD x 0.8
—V
VIL
IIN
ROUT
SHDN Logic Low Input Voltage
Input Leakage Current
SHDN, OSC
FC Pin
Output Source Resistance (IOUT = 60 mA)
——
–1.0 —
–4.0 —
— 12
0.4 V
µA
1.0
4.0
20 W
IOUT
Output Current (VOUT more negative than –3.75V)
60 100
— mA
FOSC
Oscillator Frequency
OSC Open, FC = Open or GND
SHDN = VIH, FC = VDD
5.0 10
100 200
kHz
PEFF
VEFF
Power Efficiency (FC = GND)
WRL = 2k between VDD and VOUT
WRL = 1 k between VOUT and GND
IL = 60 mA to GND
Voltage Conversion Efficiency (RL = OPEN)
93 97
94 97
— 92
99 99.9
%
—%
http://onsemi.com
2


Features MC1121 100mA Charge Pump Voltage Convert er with Shutdown The MC1121 is a charge pump converter with 100mA output curre nt capability. It converts a 2.4V to 5. 5V input to a corresponding negative ou tput voltage. As with all charge pump c onverters, the MC1121 uses no inductors saving cost, size, and reducing EMI. A n on–board oscillator operates at a t ypical frequency of 10kHz (at VDD = 5V) when the frequency control input (FC) is connected to ground. The oscillator frequency increases to 200kHz when FC i s connected to VDD, allowing the use of smaller capacitors. Operation at sub 10kHz frequencies results in lower qui escent 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 co nnected 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 extern al clock is used. The MC1121 is available in a Micro–8 package. Featu.
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