NCP2860
300 mA Very Low Noise, Low
Dropout Linear Regulator
The NCP2860 is a low noise, low dropout linear regulator that is
offered as a fixed output voltage regulator (2.77 V) and as an
adjustable output regulator from 1.25 V to 5.80 V. It supplies 300 mA
from a 3.0 V to 6.0 V input. The excellent performances that the
NCP2860 features in terms of transient responses, PSRR and noise,
make it an ideal solution for audio applications (e.g., audio amplifier
drivers).
Features
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1
Micro8
t
DM SUFFIX
CASE 846A
•
•
•
•
•
•
•
•
•
•
High Output Current (300 mA Max)
Low Output Voltage Noise: 60
mVrms
Low Dropout (150 mV @ I
out
= 300 mA)
Thermal Overload and Short Circuit Protections
Very Low Consumption in Shutdown Mode (10 nA)
High Power Supply Rejection Ratio (60 dB @ 1.0 kHz)
FAULT Indicator
Programmable Output Voltage
Soft−Start
Pb−Free Package is Available
MARKING DIAGRAM
XXX
AYW
G
G
1
XXX = Specific Device Code
A
= Assembly Location
Y
= Year
W = Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
Typical Applications
•
Cellular Phone
•
Handheld Instruments
IN
FAULT
PIN CONNECTIONS
Fault
Detect
Error
Amplifier
Bandgap
−
+
OUT
IN
GND
Drive and
Current
Limiting
OUTPUT
BUFFER
Feedback
Selection
Rint1
OUT
OUT
1
2
3
4
(Top View)
8
7
6
5
FAULT
STDWN
N.C.
SET
STDWN
SHUTDOWN
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
Thermal
Sensor
Rint2
GND
SET
©
Semiconductor Components Industries, LLC, 2010
July, 2010
−
Rev. 12
1
Publication Order Number:
NCP2860/D
NCP2860
IN
(2)
FAULT
(8)
Error
Amplifier
BANDGAP
−
+
Drive and
Current Limiting
Fault
Detect
R3
100 k
STDWN
(7)
BATTERY
C1
2.2
mF
SHUTDOWN
Feedback
Selection
OUTPUT
BUFFER
Rint1
OUT
(1,4)
R1
Thermal
Sensor
Rint2
SET
(5)
R2
C2
2.2
mF
GND
(3)
Figure 1. With External Output Voltage Adjustment
IN
(2)
FAULT
(8)
Error
Amplifier
BANDGAP
−
+
Drive and
Current Limiting
Fault
Detect
R3
100 k
STDWN
(7)
BATTERY
C1
2.2
mF
SHUTDOWN
Feedback
Selection
OUTPUT
BUFFER
Rint1
OUT
(1,4)
C2
2.2
mF
Thermal
Sensor
Rint2
GND
(3)
SET
(5)
Figure 2. Application for 2.77 V Output Voltage
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2
NCP2860
PIN DESCRIPTION
Pin
1, 4
2
3
5
6
7
8
Name
OUT
IN
GND
SET
N.C.
STDWN
FAULT
Description
“OUT’’ is the regulator output. A low ESR, bypass capacitor should be connected for stable operation.
“IN’’ is the supply input that is connected to the power source (up to 6.0 V). Bypass with a 2.2
mF
capacitor.
Ground
Ground the “SET’’ pin to set the output voltage to 2.77 V. Connect to resistor−divider for ADJ output voltage.
Refer to the “output voltage setting’’ paragraph if you need to program another value.
This pin is non−connected.
If the “STDWN’’ pin is low, the circuit enters the shutdown mode.
The “FAULT’’ terminal is a high impedance, open drain output. If the circuit is out of regulation, the voltage pin
goes low. Otherwise (normal operation or shutdown mode), this pin is high impedance. Connect the pin to
ground, if unused.
MAXIMUM RATINGS
Rating
Input Voltage, Shutdown Pin, Voltage Range (Note 1)
Thermal Resistance (Note 2)
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10s)
ESD Capability
Human Body Model
Machine Model
Latchup Capability @ 85°C
Symbol
V
inmax
−
T
Jmax
T
Smax
T
Lmax
−
−
−
Value
−0.3,
+6.0
230
150
−
65 to +150
300
2.0
200
+/−100
Unit
V
°C/W
°C
°C
°C
kV
V
mA
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. The recommended input voltage range for NCP2860 proper operation is 2.7 V to 6.0 V.
2. Circuit being mounted on a board that has no metal oxide traces attached to the leads. The addition of plated copper can lower the thermal
resistance.
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3
NCP2860
TYPICAL ELECTRICAL CHARACTERISTICS
(Note 3) (V
in
= 3.6 V, T
A
from
−25°C
to +85°C, unless otherwise noted.)
Characteristic for 2.77 V Fix Version SET = GND
Output Voltage @ I
out
= 100
mA,
300 mA, V
in
= 3.2 V and T
A
= 25°C
T
A
from
−25°C
to +85°C
Supply Current @ I
out
= 0, V
in
= 3.2 V
Supply Current @ I
out
= 300 mA, V
in
= 3.2 V
Supply Current in Shutdown Mode (STDWN Pin Grounded)
@ T
A
= 25°C
Dropout Voltage @ I
out
= 1.0 mA (Note 4)
Dropout Voltage @ I
out
= 150 mA (Note 4)
Dropout Voltage @ I
out
= 300 mA (Note 4)
SET Input Leakage Current @ V
SET
= (0
−
0.2) V and T
A
= 25°C
Short Circuit Output Current Limitation @ V
in
= 3.2 V
Start−Up Current Limitation @ T
A
= 25°C, V
in
= 3.2 V
Line Regulation, V
in
varying between 3.0 V and 6.0 V @ I
out
= 1.0 mA
Line Regulation, V
in
varying between 3.0 V and 6.0 V @ I
out
= 10 mA
Load Regulation, I
out
varying from 0.1 mA to 300 mA @ V
in
= 3.2 V
Output Voltage Noise @ C
out
= 22
mF
(Note 5)
10 Hz
t
f
t
10 kHz
10 Hz
t
f
t
100 kHz
Power Supply Rejection Ratio @ 1.0 kHz and I
out
= 100 mA
Shutdown Threshold (with hysteresis) @ V
in
= 5.0 V
Shutdown Pin Bias Current @ STDWN = IN or GND and T
A
= 25°C
FAULT Detection Voltage @ I
out
= 200 mA
FAULT Output Low Voltage @ I
sink
= 2.0 mA
FAULT Output OFF Leakage Current @ T
A
= 25°C
Start−Up Time @ C
out
= 10
mF,
I
out
= 100 mA (Note 5)
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Symbol
V
out
I
cc−0
I
cc−300
I
stdwn
V
drop−1
V
drop−150
V
drop−300
I
leak
I
max_cc
I
max_stup
Line
Reg1
Line
Reg2
Load
Reg2
−
Min
2.73
2.70
−
−
−
−
−
−
−
310
−
−0.1
−0.1
−
−
−
−
0.63
−
−
−
−
−
−
−
Typ
2.77
2.77
355
1.1
0.01
0.6
75
150
10
465
220
0.01
0.01
0.001
35
60
60
−
−
120
0.15
0.1
60
170
30
Max
2.81
2.84
700
−
1.0
−
150
250
200
700
−
0.1
0.1
−
−
−
−
2.65
100
280
0.4
100
−
−
−
Unit
V
mA
mA
mA
mV
mV
mV
nA
mA
mA
%/V
%/V
%/mA
mV
rms
PSRR
V
stdwn
l
stdwn
V
fault−th
V
fault−out
I
fault
T
stup
T
limit
H
temp
dB
V
nA
mV
V
nA
ms
°C
°C
3. The specification gives the targeted values. This specification may have to be slightly adjusted after the temperature characterization of the die.
4. The dropout voltage is defined as (V
in
−V
out
) when V
out
is 100 mV below the value of V
out
when V
in
> 3 V.
5. Refer to characterization curves for more details.
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4
NCP2860
TYPICAL ELECTRICAL CHARACTERISTICS
(Note 3) (V
in
= 3.6 V, T
A
from
−25°C
to +85°C, unless otherwise noted.)
Characteristic for Adjustable Version
Adjustable Output Voltage Range @ V
in
= V
out
+ 0.5 V and V
in
> 3 V, I
out
= (1
−
300) mA
Supply Current @ I
out
= 0, V
in
= 6 V, V
out
= 3.3 V
Supply Current @ I
out
= 300, V
in
= 6 V, V
out
= 3.3 V
Dropout Voltage @ I
out
= 1.0 mA, V
out
= 3.3 V
Dropout Voltage @ I
out
= 150 mA, V
out
= 3.3 V
Dropout Voltage @ I
out
= 300 mA, V
out
= 3.3 V
SET Threshold (SET = OUT) @ I
out
= 1 mA and V
in
= (3.0
−
6)V,
T
A
= 25°C
T
A
from
−25°C
to +85°C
SET Input Leakage Current @ V
SET
= 1.25 V and T
A
= 25°C
Short Circuit Output Current Limitation @ V
in
= V
out
+ 0.5 V, V
out
= (2.5
−
3.3) V, T
A
= 25°C
Start−Up Current Limitation @ T
A
= 25°C, V
in
= 3.8 V, V
out
= 3.3 V
Line Regulation, V
in
= (3.8
−
6) V @ I
out
= 1.0 mA and (V
out
= 3.3 V)
Line Regulation, V
in
= (3.8
−
6) V @ I
out
= 300 mA, V
out
= 3.3 V
Load Regulation, I
out
varying from 0.1 mA to 300 mA, V
out
= 3.3 V, @
V
in
= 3.8 V
Load Regulation, I
out
varying from 0.1 mA to 300 mA and V
out
= 2.5 V,
V
in
= 3.0 V
Output Voltage Noise @ SET = GND, C
out
= 22
mF
(Note 5)
10 Hz < f < 10 kHz
10 Hz < f < 100 kHz
Power Supply Rejection Ratio @ 1.0 kHz, V
out
= 3.3 V and I
out
= 10 mA
Shutdown Threshold (with hysteresis) @ V
in
= 5.0 V
Shutdown Pin Bias Current @ STDWN = IN or GND and T
A
= 25°C
FAULT Detection Voltage @ I
out
= 200 mA
FAULT Output Low Voltage @ I
sink
= 2.0 mA
FAULT Output OFF Leakage Current @ T
A
= 25°C
Start−Up Time @ C
out
= 10
mF,
V
out
= 3.3 V, I
out
= 100 mA (Note 5)
Thermal Shutdown Threshold/Hysteresis
Symbol
V
out
I
cc−0
I
cc−300
V
drop−1
V
drop−150
V
drop−300
V
ref
I
leak
I
max_cc
I
max_stup
Line
Reg1
Line
Reg300
Load
Reg3V3
Load
Reg2V5
Adjustable
−
PSRR
V
stdwn
I
stdwn
V
fault−th
Vf
ault−out
I
fault
T
stup
T
limit
/
H
temp
120
0.15
0.1
80
170/
30
0.63
−
−
310
1.226
1.22
−
Min
1.25
400
1180
0.7
80
155
1.244
1.244
10
495
200
0.1
0.3
0.001
0.0005
−
−
150
200
1.262
1.27
200
700
Typ
Max
5.80
900
1400
Unit
V
uA
uA
mV
mV
mV
V
nA
mA
mA
%/V
%/V
%/mA
%/mA
mVrms
35
60
69
2.65
100
280
0.4
100
dB
V
nA
mV
V
nA
ms
°C
3. The specification gives the targeted values. This specification may have to be slightly adjusted after the temperature characterization of the die.
4. The dropout voltage is defined as (V
in
−V
out
) when V
out
is 100 mV below the value of V
out
when V
in
> 3 V.
5. Refer to characterization curves for more details.
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