Semiconductor Components Industries, LLC, 2002
October, 2002 - Rev. 6
1
Publication Order Number:
NCP2860/D
NCP2860
300 mA Very Low Noise, Low
Dropout Linear Regulator
The NCP2860 is a low noise, low dropout linear regulator that is
offered with an output voltage of 2.77 V. It supplies 300 mA from 3.0
V to 6.0 V input. If wished, the "SET'' pin enables to adjust the output
voltage level that then depends on the voltage applied to this pin. 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
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
Typical Applications
Cellular Phone
Handheld Instruments
Bandgap
SHUTDOWN
Thermal
Sensor
Fault
Detect
Drive and
Current
Limiting
Feedback
Selection
OUTPUT
BUFFER
Error
Amplifier
-
+
STDWN
FAULT
IN
GND
OUT
Rint1
Rint2
SET
8
7
6
5
1
2
3
4
Micro8
E
DM SUFFIX
CASE 846A
8
1
1
8
LCZ = Specific Device Code
A
= Assembly Location
Y
= Year
W
= Work Week
MARKING
DIAGRAM
PIN CONNECTIONS
OUT
IN
GND
OUT
FAULT
STDWN
N.C.
SET
Device
Package
Shipping
ORDERING INFORMATION
NCP2860DM277R2
Micro8
4000 Units/Reel
(Top View)
LCx
AYW
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NCP2860
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2
PIN DESCRIPTION
Pin
Name
Description
1, 4
OUT
"OUT'' is the regulator output. A low ESR, bypass capacitor should be connected for stable operation.
2
IN
"IN'' is the supply input that is connected to the power source (up to 6.0 V). Bypass with a 2.2
m
F capacitor.
3
GND
Ground
5
SET
Ground the "SET'' pin to set the output voltage to 2.77 V. Refer to the "output voltage setting'' paragraph if
you need to program another value.
6
N.C.
This pin is non-connected.
7
STDWN
If the "STDWN'' pin is low, the circuit enters the shutdown mode.
8
FAULT
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
Symbol
Value
Unit
Input Voltage, Shutdown Pin, Voltage Range (Note 1)
V
inmax
-0.3, +6.0
V
Thermal Resistance (Note 2)
-
230
C/W
Maximum Junction Temperature
T
Jmax
150
C
Storage Temperature Range
T
Smax
- 65 to +150
C
Lead Temperature (Soldering, 10s)
T
Lmax
300
C
ESD Capability
Human Body Model
Machine Model
-
-
2.0
200
kV
V
Latch-up Capability @ 85
C
-
+/-100
mA
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.
NCP2860
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3
TYPICAL ELECTRICAL CHARACTERISTICS*
(V
in
= 3.6 V, SET = GND, T
A
from -25
C to +85
C, unless otherwise noted.)
Characteristic (2.7 V Option)
Symbol
Min
Typ
Max
Unit
Output Voltage @ I
out
= 100
m
A, 300 mA, V
in
= 3.2 V and T
A
= 25
C
T
A
from -25
C to +85
C
V
out
2.73
2.70
2.77
2.77
2.81
2.84
V
Supply Current @ I
out
= 0, V
in
= 3.2 V
I
cc- 0
-
355
700
m
A
Supply Current @ I
out
= 300 mA, V
in
= 3.2 V
I
cc- 300
-
1.1
-
mA
Supply Current in Shutdown Mode (STDWN Pin Grounded)
@ T
A
= 25
C
I
stdwn
-
0.01
1.0
m
A
Dropout Voltage @ I
out
= 1.0 mA (Note 3)
V
drop- 1
-
0.6
-
mV
Dropout Voltage @ I
out
= 150 mA (Note 3)
V
drop- 150
-
75
150
mV
Dropout Voltage @ I
out
= 300 mA (Note 3)
V
drop- 300
-
150
250
mV
SET Threshold (SET = OUT) @ I
out
= 1.0 mA and V
in
= 3.6 V or 6.0 V, T
A
= 25
C
T
A
from -25
C to +85
C
V
ref
1.226
1.220
1.244
1.244
1.262
1.270
V
SET Input Leakage Current @ V
SET
= 1.25 V and T
A
= 25
C
I
leak
-
10
200
nA
Short Circuit Output Current Limitation @ V
in
= 3.2 V and V
out
= 2.2 V
I
max_cc
310
465
700
mA
Start-Up Current Limitation @ T
A
= 25
C, V
in
= 3.2 V and V
out
= 2.2 V
I
max_stup
-
220
-
mA
Line Regulation, V
in
varying between 3.0 V and 6.0 V @ I
out
= 1.0 mA
Line
Reg1
-0.1
0.01
0.1
%/V
Line Regulation, V
in
varying between 3.0 V and 6.0 V @ I
out
= 10 mA
Line
Reg2
-0.1
0.01
0.1
%/V
Line Regulation, V
in
varying between 3.0 V and 6.0 V @ I
out
= 1.0 mA
and (SET = OUT)
Line
Reg3
-0.1
0.03
0.1
%/V
Line Regulation, V
in
varying between 3.0 V and 6.0 V @ I
out
= 10 mA
and (SET = OUT)
Line
Reg4
-0.1
0.03
0.1
%/V
Load Regulation, I
out
varying from 0.1 mA to 300 mA, SET = OUT, @ V
in
= 3.2 V
Load
Reg1
-
0.0002
-
%/mA
Load Regulation, I
out
varying from 0.1 mA to 300 mA, SET Grounded, @ V
in
= 3.2 V
Load
Reg2
-
0.001
-
%/mA
Output Voltage Noise @ SET = OUT, C
out
= 22
m
F (Note 4)
10 Hz
t
f
t
10 kHz
10 Hz
t
f
t
100 kHz
-
-
-
15
35
-
-
m
V
rms
Output Voltage Noise @ SET = GND, C
out
= 22
m
F (Note 4)
10 Hz
t
f
t
10 kHz
10 Hz
t
f
t
100 kHz
-
-
-
35
60
-
-
m
V
rms
Output Voltage Noise Density @ SET = GND, C
out
= 22
m
F, 10 Hz
t
f
t
100 kHz
(Note 4)
-
-
400
-
nV(Hz)
- 1/2
Power Supply Rejection Ratio @ 1.0 kHz and I
out
= 100 mA
PSRR
-
60
-
dB
Shutdown Threshold (with hysteresis) @ V
in
= 5.0 V
V
stdwn
0.63
-
2.65
V
Shutdown Pin Bias Current @ STDWN = IN or GND and T
A
= 25
C
l
stdwn
-
-
100
nA
FAULT Detection Voltage @ I
out
= 200 mA
V
fault- th
-
120
280
mV
FAULT Output Low Voltage @ I
sink
= 2.0 mA
V
fault- out
-
0.15
0.4
V
FAULT Output OFF Leakage Current @ T
A
= 25
C
I
fault
-
0.1
100
nA
Start-Up Time @ C
out
= 10
m
F, V
out
= 2.7, I
out
= 100 mA (Note 4)
T
stup
-
60
-
m
s
Thermal Shutdown Threshold
T
limit
-
170
-
C
Thermal Shutdown Hysteresis
H
temp
-
30
-
C
*The specification gives the targeted values. This specification may have to be slightly adjusted after the temperature characterization of the die.
3. 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
= 3.1 V.
4. Refer to characterization curves for more details.
NCP2860
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4
TYPICAL ELECTRICAL CHARACTERISTICS
(V
in
= V
out
+ 0.5 V, C
in
= C
out
= 2.2
m
F, SET = GND, T
A
= 25
C, unless otherwise noted.)
180
160
120
140
100
80
0
200
100
250
50
150
0
0.0
-0.4
0.2
-0.6
-0.2
-1.2
0.4
300
0
0.00
60
OUTPUT VOL
T
AGE (%)
-0.80
TEMPERATURE (
C)
Figure 1. Normalized Output Voltage vs.
Load Current
Figure 2. Normalized Output Voltage vs.
Temperature
OUTPUT VOL
T
AGE (%)
0
1200
1000
160
120
80
800
600
0
40
200
240
Figure 3. Supply Current vs. Load Current
LOAD CURRENT (mA)
Figure 4. No Load Supply Current vs.
Input Voltage
INPUT VOLTAGE (V)
SUPPL
Y CURRENT (
m
A)
SUPPL
Y CURRENT (
m
A)
Figure 5. Dropout Voltage vs. Load Current
LOAD CURRENT (mA)
Figure 6. Fault Detect Threshold vs.
Load Current
LOAD CURRENT (mA)
DROPOUT VOL
T
AGE (mV)
F
AUL
T DETECT THRESHOLD (mV)
0.80
0
200
150
100
50
250
300
-40
-17
100
0.00
3.45
4.30
2.60
1.75
5.15
0.90
6.00
100
400
200
0
500
600
0
200
250
150
100
50
300
V
out
Normalized at I
out
= 0
T
A
= +85
C
LOAD CURRENT (mA)
-0.40
0.40
300
-0.8
120
240
180
-1.0
7
30
53
77
I
out
= 200 mA
I
out
= 100 mA
I
out
= 0 mA
V
out
Normalized at 30
C, I
out
= 0
400
200
280
T
A
= 25
C
T
A
= -40
C
T
A
= 85
C
T
A
= 25
C
T
A
= -40
C
T
A
= 85
C
T
A
= 25
C
T
A
= -40
C
60
40
20
FAULT = HIGH
FAULT = LOW
V
out
= 2.77 V
V
out
= 2.77 V
V
out
= 2.77 V
V
out
= 2.77 V
NCP2860
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5
TYPICAL ELECTRICAL CHARACTERISTICS
(V
in
= V
out
+ 0.5 V, C
in
= C
out
= 2.2
m
F, SET = GND, T
A
= 25
C, unless otherwise noted.)
100
1000
10
10000
0.01
10
1
0.1
PSSR (dB)
FREQUENCY (kHz)
Figure 7. Power Supply Rejection Ratio
Figure 8. Output Noise Spectral Density
NOISE (nV/sqrt Hz)
0.01
0.10
1000
RMS Noise 10 Hz to 100 kHz: 59
m
V
rms
V
in
= V
out
+ 1 V
C
out
= 22
m
F
I
load
= 10 mA
V
out
= 2.77 V
FREQUENCY (kHz)
100
1000
1
10
100
V
in
= 3.26 V
SET = GND
I
load
= 10 mA
V
out
= 2.77 V
C
out
= 22
m
F
C
out
= 2.2
m
F
C4 Max
2.780 V
C4 Mean
2.7612 V
C4 Min
2.716 V
V
out
(200 mV/div)
200 mA
I
load
0 mA
V
in
10 mV/div
V
out
V
in
= V
out
+ 200 mV
I
Load
= 200 mA
4.3 V
3.3 V
Figure 9. Load Transient Response
Figure 10. Line Transient
-30
-60
-90
0
-80
-70
-40
-50
-20
-10
NCP2860
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6
TYPICAL ELECTRICAL CHARACTERISTICS
(V
in
= V
out
+ 0.5 V, C
in
= C
out
= 2.2
m
F, SET = GND, T
A
= 25
C, unless otherwise noted.)
C4 Max
2.84 V
C4 Mean
1.496 V
C4 Min
-40 mV
STDWN
(2 V/div)
V
out
(1 V/div)
C4 Max
2.79 V
C4 Mean
712 mV
C4 Min
-30 mV
C4 Max
2.77 V
C4 Mean
711 mV
C4 Min
-30 mV
V
out
(0.5 V/div)
FAULT (2 V/div)
V
in
(0.5 V/div)
FAULT (2 V/div)
V
out
(0.5 V/div)
V
in
(0.5 V/div)
Figure 11. Power-Down Response (I
load
= 100 mA)
Figure 12. Power-Up Response (I
load
= 100 mA)
Figure 13. Shutdown/Power-Up (V
in
= V
out
+ 0.5 V,
I
load
= 50 mA)
Figure 14. Shutdown/Power-Up (V
in
= V
out
+ 0.5 V,
I
load
= 0 mA)
C4 Max
2.84 V
C4 Mean
1.374 V
C4 Min
0 V
STDWN
(2 V/div)
V
out
(1 V/div)
NCP2860DM277
NCP2860DM277
NCP2860DM277
NCP2860DM277
NCP2860
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7
DETAILED OPERATING DESCRIPTION
Internal Pass Transistor
The NCP2860 incorporates a 0.5
W typical P-channel
MOSFET pass transistor. The P-channel MOSFET requires
no drive current and then compared to the PNP based
regulators, this solution drastically reduces the quiescent
current and associated losses.
Shutdown Block
The circuit turns into shutdown mode when the shutdown
pin is in low state. In this mode, the internal biasing current
sources are disconnected so that the pass transistor is off and
the consumption reduced to a minimum value. Practically,
the shutdown consumption is in the range of 10 nA. When
this function is unused, "IN'' is generally applied to the
shutdown pin.
Current Limitation
The NCP2860 incorporates a short circuit protection that
prevents the pass transistor current from exceeding 465 mA
typically. The current limit is set to 220 mA during the
start-up phase.
Thermal Protection
The thermal protection protects the die against excessive
overheating. Practically, when the junction temperature
exceeds 170
C for the 2.77 V option and 150
C for the 3.0
V option, an internal thermal sensor sends a logical signal to
the shutdown block so that the circuit enters the shutdown
mode. Once the die has cooled enough (typically 30
C), the
circuit enters a new working phase.
Output Voltage Setting
The output voltage is set to 2.77 V if the "SET'' pin is
grounded. It can also be programmed to a different value. To
do so, a portion of the output voltage must be applied to the
"SET'' pin. If a (R1, R2) resistors divider is used, then:
V
out
= (1 + R1/R2) * V
ref
Therefore, as V
ref
typically equals 1.244 V:
V
out
= 1.244 * (1 + R1/R2).
Now if R1 and R2 are high impedance resistors, the
leakage current that is absorbed by the "SET'' pin, may have
to be taken into account as follows:
V
out
= [1.244 * (1 + R1/R2)] + (R1*I
lk
) where I
lk
is the
"SET'' pin leakage current.
If the output voltage is directly applied to the "SET'' pin,
V
out
= V
ref
= 1.244 V.
OUT
SET
NCP2860
R1
R2
V
out
Regulation
The circuit incorporates a transconductance error
amplifier. The error amplifier output varies in response to
load and input voltage variations to control the pass
transistor current so that the "OUT'' pin delivers the wished
voltage. No compensation capacitor is required.
Fault Detection Circuitry
The circuit detects when the input-output differential
voltage is too low to ensure a correct load and line regulation
at the output. The input-output differential threshold scales
proportionally with the load current to be always just higher
than the dropout.
When the circuit detects a fault condition, an internal
switch connects "FAULT'' to ground. In normal operation,
the "FAULT'' terminal is an open-drain-N-channel
MOSFET and if a pull-up resistor is connected between
"OUT'' and "FAULT'', "FAULT'' goes high. The pull-up
resistor is generally selected in the range of 100 k
W to
minimize the current consumption.
Application Information
It is recommended to use 2.2
mF capacitors on the input
and on the output of the NCP2860. Capacitor type is not very
critical. Simply the ESR should be lower than 0.5
W to
ensure a stable operation over the temperature and output
current ranges. It could be convenient to increase the
capacitor size and its quality (lower ESR) only if it was
necessary to further improve the noise performances, the
Power Supply Rejection Ratio or the fast transient response.
NCP2860
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8
BANDGAP
BANDGAP
SHUTDOWN
Thermal
Sensor
Fault
Detect
Drive and
Current Limiting
Feedback
Selection
OUTPUT
BUFFER
Error
Amplifier
-
+
STDWN
FAULT
IN
GND
OUT
Rint1
Rint2
R3
100 k
(3)
(7)
(2)
(8)
(1,4)
C1
2.2
m
F
BATTERY
C2
2.2
m
F
SHUTDOWN
Thermal
Sensor
Fault
Detect
Drive and
Current Limiting
Feedback
Selection
OUTPUT
BUFFER
Error
Amplifier
-
+
STDWN
FAULT
IN
GND
OUT
SET
Rint1
Rint2
R3
100 k
(3)
(7)
(2)
(8)
(5)
(1,4)
C1
2.2
m
F
BATTERY
C2
2.2
m
F
R1
R2
Figure 15. With External Output Voltage Adjustment
Figure 16. Application for 2.77 V Output Voltage
(5)
SET
NCP2860
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9
PACKAGE DIMENSIONS
Micro8
DM SUFFIX
CASE 846A-02
ISSUE F
S
B
M
0.08 (0.003)
A
S
T
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
2.90
3.10
0.114
0.122
B
2.90
3.10
0.114
0.122
C
---
1.10
---
0.043
D
0.25
0.40
0.010
0.016
G
0.65 BSC
0.026 BSC
H
0.05
0.15
0.002
0.006
J
0.13
0.23
0.005
0.009
K
4.75
5.05
0.187
0.199
L
0.40
0.70
0.016
0.028
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT
EXCEED 0.15 (0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.25 (0.010)
PER SIDE.
5. 846A-01 OBSOLETE, NEW STANDARD 846A-02.
-B-
-A-
D
K
G
PIN 1 ID
8 PL
0.038 (0.0015)
-T-
SEATING
PLANE
C
H
J
L
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Notes
NCP2860
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11
Notes
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ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make
changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all
liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be
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PUBLICATION ORDERING INFORMATION
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2-9-1 Kamimeguro, Meguro-ku, Tokyo, Japan 153-0051
Phone: 81-3-5773-3850
Email: r14525@onsemi.com
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For additional information, please contact your local
Sales Representative.
NCP2860/D
Micro8 is a trademark of International Rectifier.
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