NEC uPC337HF Datasheet
DATA SHEET
123
1 : ADJ
2 : INPUT
3 : OUTPUT
BIPOLAR ANALOG INTEGRATED CIRCUIT
µ
PC337
3-TERMINAL NEGATIVE ADJUSTABLE REGULATOR
The µPC337 is an adjustable 3-terminal negative voltage regulator, which has 1.5 A capable for the output
current. The output voltage can be set any value between –1.3 V and –30 V by two external resistors.
FEATURES
• Output current excess of 1.5 A
• On-chip some protection circuit (over current protection, SOA protection and thermal shut down).
ORDERING INFORMATION
Part Number Package
µ
PC337HF 3-pin plastic SIP (MP-45G) (isolated TO-220)
EQUIVALENT CIRCUIT
R
41
Q
1
R
1
Q
3
Q
8
D
Q
13
Q
12
R
Q
14
R
13
4
22
R
D
23
5
D
1
R
24
R
9
D
2
PIN CONFIGURATION (Marking Side)
R
3
R
2
Q
2
R
5
R
42
R
Q
4
C
1
C
2
R
6
Q
6
4
Q
5
R
8
C
3
R
7
Q
7
D
7
R
Q
36
28
Q
29
ADJ
OUTPUT
R
14
R
Q
15
R
15
Document No. G13783EJ2V0DS00 (2nd edition)
(Previous No. IN-1878)
Date Published October 1998 N CP(K)
Printed in Japan
17
R
16
Q
19
Q
Q
17
Q
16
R
18
Q
18
Q
20
R
19
R
20
The information in this document is subject to change without notice.
Q
R
28
R
Q
22
21
R
21
R
25
D
3
D
6
Q
Q
9
Q
11
10
Q
R
11
R
10
R
33
26
Q
24
C
Q
23
26
4
R
27
R
35
Q
R
C
R
29
R
31
27
R
34
30
37
5
Q
Q
31
R
30
R
25
R
32
39
R
38
R
40
INPUT
The mark shows major revised points.
©
1986
ABSOLUTE MAXIMUM RATINGS (TA = 25 °C, unless otherwise specified.)
Parameter Symbol Rating Unit
Input-Output Voltage Differential VIN – VO –40 V
Total Power Dissipation PT 15
Operating Ambient Temperature TA –20 to +85 °C
Operating Junction Temperature TJ –20 to +150 °C
Storage Temperature Tstg –65 to +150 °C
Thermal Resistance (junction to case) Rth(J-C) 7 °C/W
Thermal Resistance (junction to ambient) Rth(J-A) 65 °C/W
Note Internally limited.
When operating junction temperature rise up to 150 °C (≤200 °C), the internal circuit shutdown output
voltage.
Caution Exposure to Absolute Maximum Ratings for extended periods may affect device reliability;
exceeding the ratings could cause permanent damage. The parameters apply independently.
The device should be operated within the limits specified under DC and AC Characteristics.
Note
V
µ
PC337
RECOMMENDED OPERATING CONDITIONS
Parameter Symbol MIN. TYP. MAX. Unit
Input-Output Voltage Differential VIN – VO –3 –5 –38.7 V
Input Voltage VIN –4.3 –40 V
Output Voltage VO –1.3 –30 V
Output Current IO 0.01 1.5 A
Operating Junction Temperature TJ –20 +125 °C
2
TYPICAL CONNECTION
µ
PC337
D
2
IN
V
INPUT
µ
PC337
ADJ
C
IN
µ
1 F
ADJ
C
µ
10 F
R
2
+
Remark R1, R2 : Resistor to set the output voltage.
R
O = (1 + ) • VREF + IADJ • R2 = (1 + ) • VREF
V
2
R1
•
•
VO (V) R2 (Ω : TYP.)
–1.25 0
–2.5 120
–5.0 360
–12 1032
–24 2184
–30 2760
R2
R1
OUTPUT
1
R
120 Ω
O
V
D
1
O
C
µ
4.7 F
+
CIN : Need to stop the oscillation for the long input wiring length.
O : Need to stop the oscillation for the long output wiring length.
C
Improve the transient stability of the output voltage when the lord current is suddently changed.
CADJ : Improve the ripple rejection and the oscillate rejection.
1 : Protect against CADJ from output short.
D
D2 : Need for VIN > VO.
3
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