UPC305 Datasheet, PDF (1/8 Pages) NEC – POSITIVE VOLTAGE STABILIZED POWER SUPPLY

DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUT
µPC305
POSITIVE VOLTAGE STABILIZED POWER SUPPLY
DESCRIPTION
The µPC305 is a high-performance stabilized power supply that can supply a constant voltage in a wide
temperature range even if the input voltage or load voltage fluctuates, by integrating a high-gain error amplifier and a
temperature-compensating constant-voltage diode on a single chip.
FEATURES
• Wide output voltage variable range Vo: 4.5 to 30 V, VDIF: 3 to 30 V
• Excellent load stability
0.02%
• Good ripple rejection ratio
0.003%/V
ORDERING INFORMATION
Part Number
Package
µPC305C
µPC305G2
8-pin plastic DIP (7.62 mm (300))
8-pin plastic SOP (5.72 mm (225))
PIN CONFIGURATION (Top View)
µPC305C, 305G2
Current limiter 1
8 Output
Current output 2
7 Compensation
Input 3
6 Error detection
GND 4
5 Reference voltage
EQUIVALENT CIRCUIT
R7 2.8 kΩ
Q11
Q12
Q13
Q10
Q14
R8
1.86 kΩ
R10
600 Ω
Q15
Q9
Q7
Q8
R6
Q6
4.4 kΩ
R9
Q16 1.32 kΩ
D1
R4
3 kΩ
Q5
Q4
R3
Q17
6.8 kΩ
Q18
R2
3 kΩ
Q2
Q3
C1
5 pF
Q1
R5
2.2 kΩ
3 Input
2 Current output
1 Current limiter
8 Output
7 Compensation
6 Error detection
5 Reference voltage
4 GND
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. G10633EJ3V0DS00 (3rd edition)
Date Published December 1999 N CP(K)
Printed in Japan
©
1999