Pump Regulator (100mA)
R1250V××1A SERIES
OUTLINE
process.
Each of these ICs consists of an oscillator, a control circuit, a reference voltage unit, an error amplifier, and
range from -2V to -4V from positive input voltage.
The R1250V××1A Series are Negative Output Charge Pump Regulator ICs, which can be developed as loca
suppliers for portable appliances and small electric appliances used with batteries, with low supply current by
put driver circuit. The R1250V××1A can easily supply negative voltage, or regulated setting output voltage
The chip enable function works to shut down the internal circuit and reduces supply current at the stand-by
rent.
board is possible.
therefore the R1250V××1A is very suitable for the application such as portable systems that require low supp
Since the package for this IC is TSSOP8 package (TSOP8 in EIAJ standard), high density mounting of the
FEATURES
•
Output Current..................... 100mA (MAX. at V
IN
=5.0V C
IN
=C
P
=C
OUT
=4.7µF, Set Output Voltage=-3.0V)
,
•
Output Voltage Accuracy...... ±3.0% (V
IN
=5.0V C
IN
=C
P
=C
OUT
=4.7µF, Set Output Voltage=-3.0V I
OUT
=0mA/1
,
,
±9.0% (V
IN
=5.0V C
IN
=C
P
=C
OUT
=4.7µF, Set Output Voltage=-3.0V I
OUT
=50mA
,
,
•
Range of Input Voltage .........
V
OUT
V
to +5.5V (Set Output Voltage=-4.0V to -2.8V)
+2.7V to +5.5V (Set Output Voltage=-2.7V to -2.0V)
•
Oscillator Frequency ............ TYP 280kHz
.
•
Chip Enable Function (Active at “L”)
•
Package ................................. TSSOP8
•
Output Voltage...................... Stepwise setting with a step of 0.1V in the range from -2.0V to -4.0V is possible.
APPLICATIONS
•
Power source for Disk Drives.
•
Power source for hand-held communication equipment and battery-powered equipment.
•
Power source for PC peripherals and ADD-ON cards.
•
Power source for portable audio-visual appliances such as cameras.
•
Local power source for small electrical appliances.
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
C
P+
GND
C
P-
——
CE
NC
Vref
V
OUT
V
IN
Symbol
Description
C
P
(Capacitor for Charge Pump) Positive Power Supply Pin
Ground Pin
C
P
(Capacitor for Charge Pump) Negative Power Supply Pin
Chip Enable Pin (active at “L”)
No Connection Pin
Output Pin for Reference Voltage
(*Note1)
Output Pin for Negative Regulator
Power Supply Pin
*Note1 Vref is just a monitoring pin, therefore remain open. Do not connect any load. Refer to T
cal Notes.
ABSOLUTE MAXIMUM RATINGS
(GND=0V)
Symbol
V
IN
V
CE
V
P+
Vref
V
P-
V
OUT
I
OUT
P
D
Topt
Tstg
Item
V
IN
Supply Voltage
——
CE Pin Input Voltage
C
P+
Pin Input Voltage
Vref Pin Voltage
C
P
- Pin Input Voltage
V
OUT
Pin Voltage
Output Current
Power Dissipation
*NOTE1
Operating Temperature Range
Storage Temperature Range
Rating
-0.3 to 7.5
-0.3 to V
IN
+0.3
-0.3 to V
IN
+0.3
-0.3 to V
IN
+0.3
V
IN
-12 to +0.3
V
IN
-12 to +0.3
200
490
-40 to +85
-55 to +125
Unit
V
V
V
V
V
V
mA
mW
°C
°C
*Note1: Power dissipation is specified under the specified condition.
Conditions;
Evaluation Board Dimensions: 50mm
×
50mm
×
1.6mm
Material: Glass Epoxy (FR-4)
Reverse side of the evaluation board: Plane Copper
Surface of the evaluation board: Land pattern and Wiring
SELECTION GUIDE
The output voltage and the active type for the ICs can be selected at the user’s request.
The selection can be made with designating the part number as shown below;
R1250V××1A-××
↑ ↑ ↑
a b c
Code
Setting Output Voltage
a
××:
The absolute value of Output Voltage
Stepwise setting with a step of 0.1V in the range of -2.0V to -4.0V is possible.
b
c
Designation of Active Type of the Chip Enable Circuit:
A (fixed) : “L active type
”
Designation of Packing Type
E2 : E2 1reel=2000pcs
Contents
4
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