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PDF UPC2255 Data sheet ( Hoja de datos )
| Número de pieza | UPC2255 | |
| Descripción | (UPC2250 Series) Low Staturated Stabilized Power Supply with System Reset Pin | |
| Fabricantes | NEC | |
| Logotipo |  |
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DDAATTAA SSHHEEEETT
BIPOLAR ANALOG INTEGRATED CIRCUIT
µPC2250 SERIES
LOW-SATURATED STABILIZED POWER SUPPLY WITH SYSTEM RESET PIN
DESCRIPTION
The µPC2250 series is a collection of low-saturated 4-pin stabilized power supplies with a pin that outputs a reset
signal when a drop in the input voltage is detected.
Because the reverse leakage current of these power supplies is about 1 µA even if a voltage is applied to the
output pin when the input voltage is cut off, these power supplies are ideal for systems with on-board
microprocessors requiring battery backup.
FEATURES
• Low minimum voltage difference between input and output
VDIF = 0.15 V TYP. (at IO = 40 mA)
• Outputs reset signal (active-low) when the input voltage or
output voltage drops.
• Low reverse leakage current during back up
IOLK = 1 µA TYP.
• Low circuit operating current under no load
IBIAS = 1.3 mA TYP.
ORDERING INFORMATION
Part Number
µPC2251H
µPC2253H
µPC2255H
Package
4-pin plastic SIP (TO-126)
4-pin plastic SIP (TO-126)
4-pin plastic SIP (TO-126)
PIN CONFIGURATION (Marking Side)
4-pin plastic SIP (TO-126)
µPC2251H, 2253H, 2255H
12 34
1: INPUT
2: RESET
3: GND
4: OUTPUT
Output Voltage
3V
5 V (TYPE1)
5 V (TYPE2)
BLOCK DIAGRAM
INPUT
Overcurrent
limiter circuit
Starter
circuit
Reference
voltage circuit
Error
amplifier
circuit
OUTPUT
Reset circuit
RESET
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. G14451EJ2V0DS00 (2nd edition)
Date Published December 1999 N CP(K)
Printed in Japan
©
1999
1 page  
µPC2250 SERIES
µPC2255
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol MIN.
Input Voltage
VIN 5.5
Output Current
IO 0
Operating Junction Temperature
TJ –20
TYP.
6
MAX.
12
40
+125
Unit
V
mA
°C
Caution The recommended operating range may be exceeded without causing any problems provided
that the absolute maximum ratings are not exceeded. However, if the device is operated in a way
that exceeds the recommended operating conditions, the margin between the actual conditions
of use and the absolute maximum ratings is small, and therefore thorough evaluation is
necessary. The recommended operating conditions do not imply that the device can be used
with all values at their maximum values.
ELECTRICAL SPECIFICATIONS
(Unless otherwise specified, VIN = 6 V, IO = 40 mA, TJ = 25°C, CIN = 0.33 µF, CO = 10 µF.)
Parameter
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Output Current
Temperature Coefficient of Output Voltage
OFF Output Leakage Current
Reset Start Output Voltage
Reset Output Saturated Voltage
Symbol
VO1
VO2
REGIN
REGL
IBIAS
∆IBIAS
Vn
R•R
VDIF
IOshort
IOpeak
∆VO/∆T
IOLK
VORT
VRT(sat)
Conditions
MIN.
5.5 V ≤ VIN ≤ 12 V, 1 mA ≤ lo ≤ 40 mA,
0°C ≤ TJ ≤ 125°C
5.5 V ≤ VIN ≤ 12 V
1 mA ≤ lO ≤ 100 mA
4.8
4.75
1 mA ≤ lO ≤ 40 mA
IO = 0 A
IO = 100 mA
6 V ≤ VIN ≤ 12 V
10 Hz ≤ f ≤ 100 kHz
f = 120 Hz, 6 V ≤ VIN ≤ 11 V
46
IO = 40 mA, 0°C ≤ TJ ≤ 125°C
VIN = 12 V
VIN = 6 V
IO = 5 mA, 0°C ≤ TJ ≤ 125°C
VIN = 0 V, VO = 5.0 V
0°C ≤ TJ ≤ 125°C
VO1−0.3
IR = 1.6 mA
TYP.
5.0
8.0
130
0.15
15
150
0.3
MAX.
5.2
5.25
Unit
V
V
30 mV
80 mV
30 mV
2.0 mA
mA
1.0 mA
µVr.m.s.
dB
0.30 V
mA
mA
mV/°C
10 µA
VO1−0.2
V
0.8 V
Data Sheet G14451EJ2V0DS00
5
5 Page 
[MEMO]
µPC2250 SERIES
Data Sheet G14451EJ2V0DS00
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet UPC2255.PDF ] | |
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