DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µ
PC2260
LOW DROPOUT VOLTAGE REGULATOR WITH SYSTEM RESET PIN
DESCRIPTION
The
µ
PC2260 is a 500 mA maximum output current low dropout voltage regulator with a reset pin that outputs a reset
signal when a drop in the output voltage is detected, and a reset signal output timing adjustment pin.
The output voltage is 5 V, and the minimum voltage difference between input and output is extremely low, making this
product ideal for use in the power supply circuits of systems with built-in battery-driven microprocessors.
Because the reverse leakage current of this power supply is about 10
µ
A even if a voltage is applied to the output pin
when the input voltage is cut off, a reverse protection diode is not necessary even in systems requiring battery backup.
FEATURES
• Outputs reset signal (active low) when the output voltage drops.
• Power on reset constant can be set by attaching a single capacitor.
• Low minimum voltage difference between input and output
V
DIF
= 0.5 V TYP (when I
O
= 500 mA)
.
• Low reverse current leakage during back up
I
OLK
= 10
µ
A MAX. (at V
IN
= 0 V, V
O
= 5 V, 0°C
≤
T
J
≤
125°C)
PIN CONFIGURATION (Marking Side)
5-pin plastic V-DIP (V)
µ
PC2260V
1: INPUT
2: RESET
1 2 3 4 5
3: GND
4: DELAY CAPACITOR
5: OUTPUT
ORDERING INFORMATION
Part Number
Package
5-pin plastic V-DIP (V)
µ
PC2260V
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. G14901EJ2V0DS00 (2nd edition)
Date Published June 2000 NS CP (K)
Printed in Japan
©
2000
µ
PC2260
BLOCK DIAGRAM
INPUT
Start-up
circuit
Reference
voltage
circuit
Safe operating
area protection
Error
amplifier
Drive
circuit
OUTPUT
Leakage
protection
circuit
Reset circuit
Over current
protection circuit
GND
DELAY CAPACITOR
3 kΩ
RESET
Thermal
shut down
circuit
2
Data Sheet G14901EJ2V0DS00
µ
PC2260
ABSOLUTE MAXIMUM RATINGS (T
A
= +25
°
C, unless otherwise specified.)
Parameter
Input Voltage
Reset Pin Applied Voltage
Total Power Dissipation (T
C
= 25°C)
Operating Ambient Temperature
Operating Junction Temperature
Storage Temperature
Thermal Resistance
(Junction to Case)
Thermal Resistance
(Junction to Ambient Air)
R
th (J-A)
83
°C/W
Symbol
V
IN
V
RST
P
T
T
A
T
J
T
stg
R
th (J-C)
Ratings
−0.3
to +35
−0.3
to +35
20
Note
−20
to +85
−20
to +150
−55
to +150
4
Unit
V
V
W
°C
°C
°C
°C/W
Note
The total loss is limited by an internal circuit. Where T
J
> 150°C, an internal protection circuit cuts off the output.
Caution Product quality may suffer if the absolute maximum rating is exceeded even momentarily for any
parameter. That is the absolute maximum ratings are rated values at which the product is on the verge
of suffering physical damage, and therefore the product must be used under conditions that ensure
that the absolute maximum ratings are not exceeded.
TYPICAL CONNECTION
INPUT
1
4
C
IN
0.33
µ
F
DELAY
CAPACITOR
C
DLY
3
5
2
D
C
O
47
µ
F
Backup capacitor
Reset output
(active low)
OUTPUT
GND RESET
C
IN
: 0.1
µ
F to 0.47
µ
F. Determine the capacitance depending on the line between the power supply smoothing circuit
and input pin.
Be sure to connect this capacitor to prevent abnormal oscillation. Use of a capacitor, such as a film capacitor, with
excellent voltage and temperature characteristics is recommended. Note that some laminated ceramic capacitors
have poor temperature and voltage characteristics. When using a laminated ceramic capacitor, the capacitance
must be stable in the voltage and temperature ranges used.
C
O
: Must be 47
µ
F or more. Be sure to connect this capacitor to prevent oscillation and to improve transient load
stability.
Connect C
IN
and C
O
as close to the IC (within 1 to 2 cm) as possible. When using this product below 0°C, select an
electrolytic capacitor with low impedance characteristics.
D : Connect Schottky barrier diode (with a low forward voltage) if the voltage on the OUTPUT pin is lower than that on
the GND pin.
Data Sheet G14901EJ2V0DS00
3
µ
PC2260
RECOMMENDED OPERATING CONDITIONS
Parameter
Input Voltage
Output Current
Operating Junction Temperature
Symbol
V
IN
I
O
T
J
MIN.
6
5
−20
TYP.
MAX.
20
500
+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 CHARACTERISTICS
(T
J
= 25
°
C, V
IN
= 9 V, I
O
= 350 mA, C
IN
= 0.33
µ
F, C
O
= 47
µ
F, unless otherwise specified.)
Parameter
Output Voltage
Symbol
V
O
6 V
≤
V
IN
≤
20 V, 5 mA
≤
I
O
≤
500 mA,
0
°C ≤
T
J
≤
125
°C
Line Regulation
Load Regulation
Operating Circuit Current
REG
IN
REG
L
I
BIAS
6.5 V
≤
V
IN
≤
20 V
5 mA
≤
I
O
≤
500 mA
I
O
= 0 A
I
O
= 500 mA
Operating Circuit Current Change
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Peak Output Current
Temperature Coefficient of Output
Voltage
OFF Output Leakage Current
Reset Output Voltage (High Level)
Reset Output Voltage (Low Level)
I
OLK
V
RSTH
V
RSTL
V
IN
= 0 V, V
O
= 5 V, 0
°C ≤
T
J
≤
125
°C
I
RSTH
= 100
µ
A, 0
°C ≤
T
J
≤
125
°C
Reset output is active (low level),
I
RSTL
= 1.6 mA, 0
°C ≤
T
J
≤
125
°C
Reset Output Leakage Current
Output Voltage to Output Reset
Signal
Reset Output Delay Time
t
d
C
DLY
= 0.1
µ
F, 0
°C ≤
T
J
≤
125
°C
30
ms
I
RLK
V
O(RST)
V
O(RST)
≤
V
O
, 0
°C ≤
T
J
≤
125
°C
0
°C ≤
T
J
≤
125
°C
V
O
−
0.2
10
V
O
−
0.1
V
O
−
0.5
0.6
0.8
10
5
10
2
50
50
5
30
10
130
56
65
0.5
0.7
I
O
= 5 mA, 0
°C ≤
T
J
≤
125
°C
0.95
0.4
0.8
1.2
mV
mV
mA
mA
mA
Test Conditions
MIN.
4.8
4.75
TYP.
5.0
MAX.
5.2
5.25
Unit
V
V
∆
I
BIAS
V
n
R•R
V
DIF
I
O peak
6.5 V
≤
V
IN
≤
20 V, I
O
= 500 mA
10 Hz
≤
f
≤
100 kHz
f = 120 Hz, 6.5 V
≤
V
IN
≤
16.5 V
I
O
= 500 mA
µ
V
r.m.s.
dB
V
A
mV/°C
∆
V
O
/
∆
T
µ
A
V
V
µ
A
V
4
Data Sheet G14901EJ2V0DS00
µ
PC2260
RESET OUTPUT RESPONSE CHARACTERISTICS
V
O
OUTPUT
0V
V
RSTH
RESET
V
RSTL
t
d
t
d
V
O(RST)
.
Remark
t
d
= 30 ms TYP at C
DLY
= 0.1
µ
F
Data Sheet G14901EJ2V0DS00
5
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