ON NCP2860 300 ma very low noise, low dropout linear regulator Datasheet

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).
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Features
•
•
•
•
•
•
•
•
•
•
1
High Output Current (300 mA Max)
Low Output Voltage Noise: 60 Vrms
Low Dropout (150 mV @ Iout = 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
Micro8t
DM SUFFIX
CASE 846A
MARKING DIAGRAM
LCZ
AYW G
G
Typical Applications
• Cellular Phone
• Handheld Instruments
1
IN
LCZ = Specific Device Code
A
= Assembly Location
Y
= Year
W = Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
FAULT
Fault
Detect
PIN CONNECTIONS
Error
Amplifier
Bandgap
STDWN
−
+
Drive and
Current
Limiting
OUTPUT
BUFFER
SHUTDOWN
Thermal
Sensor
OUT
OUT
1
8
FAULT
IN
2
7
STDWN
GND
3
6
N.C.
OUT
4
5
SET
(Top View)
Rint1
Feedback
Selection
ORDERING INFORMATION
Rint2
Device
NCP2860DM277R2
NCP2860DM277R2G
GND
© Semiconductor Components Industries, LLC, 2006
April, 2006 − Rev. 8
Package
Shipping †
Micro8
4000/Tape & Reel
Micro8 4000/Tape & Reel
(Pb−Free)
SET
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
1
Publication Order Number:
NCP2860/D
NCP2860
PIN DESCRIPTION
Pin
Name
Description
1, 4
OUT
2
IN
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
8
FAULT
“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 F capacitor.
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)
Symbol
Value
Unit
Vinmax
−0.3, +6.0
V
−
230
°C/W
Maximum Junction Temperature
TJmax
150
°C
Storage Temperature Range
TSmax
− 65 to +150
°C
Lead Temperature (Soldering, 10s)
TLmax
300
°C
ESD Capability
Human Body Model
Machine Model
−
−
2.0
200
kV
V
Latchup Capability @ 85°C
−
+/−100
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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NCP2860
TYPICAL ELECTRICAL CHARACTERISTICS (Note 3) (Vin = 3.6 V, SET = GND, TA from −25°C to +85°C, unless otherwise noted.)
Symbol
Min
Typ
Max
Unit
Output Voltage @ Iout = 100 A, 300 mA, Vin = 3.2 V and TA = 25°C
TA from −25°C to +85°C
Characteristic (2.7 V Option)
Vout
2.73
2.70
2.77
2.77
2.81
2.84
V
Supply Current @ Iout = 0, Vin = 3.2 V
Icc−0
−
355
700
A
Supply Current @ Iout = 300 mA, Vin = 3.2 V
Icc−300
−
1.1
−
mA
Supply Current in Shutdown Mode (STDWN Pin Grounded)
@ TA = 25°C
Istdwn
−
0.01
1.0
A
Dropout Voltage @ Iout = 1.0 mA (Note 4)
Vdrop−1
−
0.6
−
mV
Dropout Voltage @ Iout = 150 mA (Note 4)
Vdrop−150
−
75
150
mV
Dropout Voltage @ Iout = 300 mA (Note 4)
Vdrop−300
−
150
250
mV
SET Threshold (SET = OUT) @ Iout = 1.0 mA and Vin = 3.6 V or 6.0 V, TA = 25°C
TA from −25°C to +85°C
Vref
1.226
1.220
1.244
1.244
1.262
1.270
V
SET Input Leakage Current @ VSET = 1.25 V and TA = 25°C
Ileak
−
10
200
nA
Short Circuit Output Current Limitation @ Vin = 3.2 V and Vout = 2.2 V
Imax_cc
310
465
700
mA
Start−Up Current Limitation @ TA = 25°C, Vin = 3.2 V and Vout = 2.2 V
Imax_stup
−
220
−
mA
Line Regulation, Vin varying between 3.0 V and 6.0 V @ Iout = 1.0 mA
LineReg1
−0.1
0.01
0.1
%/V
Line Regulation, Vin varying between 3.0 V and 6.0 V @ Iout = 10 mA
LineReg2
−0.1
0.01
0.1
%/V
Line Regulation, Vin varying between 3.0 V and 6.0 V @ Iout = 1.0 mA
and (SET = OUT)
LineReg3
−0.1
0.03
0.1
%/V
Line Regulation, Vin varying between 3.0 V and 6.0 V @ Iout = 10 mA
and (SET = OUT)
LineReg4
−0.1
0.03
0.1
%/V
Load Regulation, Iout varying from 0.1 mA to 300 mA, SET = OUT, @ Vin = 3.2 V
LoadReg1
−
0.0002
−
%/mA
Load Regulation, Iout varying from 0.1 mA to 300 mA, SET Grounded, @ Vin = 3.2 V
LoadReg2
−
0.001
−
%/mA
−
−
15
35
−
−
−
−
35
60
−
−
−
400
−
nV(Hz)−1/2
Output Voltage Noise @ SET = OUT, Cout = 22 F (Note 5)
10 Hz t f t 10 kHz
10 Hz t f t 100 kHz
−
Output Voltage Noise @ SET = GND, Cout = 22 F (Note 5)
10 Hz t f t 10 kHz
10 Hz t f t 100 kHz
−
Output Voltage Noise Density @ SET = GND, Cout = 22 F, 10 Hz t f t 100 kHz
(Note 5)
−
Vrms
Vrms
Power Supply Rejection Ratio @ 1.0 kHz and Iout = 100 mA
PSRR
−
60
−
dB
Shutdown Threshold (with hysteresis) @ Vin = 5.0 V
Vstdwn
0.63
−
2.65
V
Shutdown Pin Bias Current @ STDWN = IN or GND and TA = 25°C
lstdwn
−
−
100
nA
FAULT Detection Voltage @ Iout = 200 mA
Vfault−th
−
120
280
mV
FAULT Output Low Voltage @ Isink = 2.0 mA
Vfault−out
−
0.15
0.4
V
FAULT Output OFF Leakage Current @ TA = 25°C
Ifault
−
0.1
100
nA
Start−Up Time @ Cout = 10 F, Vout = 2.7, Iout = 100 mA (Note 5)
Tstup
−
60
−
s
Thermal Shutdown Threshold
Tlimit
−
170
−
°C
Thermal Shutdown Hysteresis
Htemp
−
30
−
°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 (Vin−Vout) when Vout is 100 mV below the value of Vout when Vin = 3.1 V.
5. Refer to characterization curves for more details.
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NCP2860
TYPICAL ELECTRICAL CHARACTERISTICS
(Vin = Vout + 0.5 V, Cin = Cout = 2.2 F, SET = GND, TA = 25°C, unless otherwise noted.)
0.80
0.4
Iout = 100 mA
0.2
OUTPUT VOLTAGE (%)
OUTPUT VOLTAGE (%)
Vout Normalized at Iout = 0
0.40
0.00
−0.40
Iout = 0 mA
0.0
−0.2
Iout = 200 mA
−0.4
−0.6
−0.8
−1.0
−0.80
60
120
180
240
−1.2
300
−40
−17
7
30
53
TEMPERATURE (°C)
Figure 1. Normalized Output Voltage vs.
Load Current
Figure 2. Normalized Output Voltage vs.
Temperature
1200
600
1000
500
800
TA = −40°C
TA = 85°C
600
TA = 25°C
400
200
TA = 25°C
TA = +85°C
400
300
TA = −40°C
200
100
Vout = 2.77 V
Vout = 2.77 V
0
0
40
80
120
160
200
240
0
0.00
280
0.90
1.75
2.60
3.45
4.30
5.15 6.00
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
Figure 3. Supply Current vs. Load Current
Figure 4. No Load Supply Current vs.
Input Voltage
250
180
140
FAULT DETECT THRESHOLD (mV)
Vout = 2.77 V
160
DROPOUT VOLTAGE (mV)
100
77
LOAD CURRENT (mA)
SUPPLY CURRENT (A)
SUPPLY CURRENT (A)
0
Vout Normalized at 30°C, Iout = 0
TA = 25°C
120
TA = 85°C
100
80
TA = −40°C
60
40
20
0
0
50
100
150
200
250
Vout = 2.77 V
200
150
FAULT = HIGH
100
50
FAULT = LOW
0
0
300
50
100
150
200
250
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 5. Dropout Voltage vs. Load Current
Figure 6. Fault Detect Threshold vs.
Load Current
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300
NCP2860
TYPICAL ELECTRICAL CHARACTERISTICS
(Vin = Vout + 0.5 V, Cin = Cout = 2.2 F, SET = GND, TA = 25°C, unless otherwise noted.)
0
−20
PSSR (dB)
−30
NOISE (nV/sqrt Hz)
−10
10000
Vin = 3.26 V
SET = GND
Iload = 10 mA
Vout = 2.77 V
Cout = 2.2 F
1000
−40
Cout = 22 F
−50
RMS Noise 10 Hz to 100 kHz: 59 Vrms
−60
100
Vin = Vout + 1 V
Cout = 22 F
Iload = 10 mA
Vout = 2.77 V
−70
−80
−90
0.01
0.1
1
10
100
1000
10
0.01
0.10
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
Figure 7. Power Supply Rejection Ratio
Figure 8. Output Noise Spectral Density
4.3 V
C4 Max
2.780 V
Vout
(200 mV/div)
Vin
3.3 V
C4 Mean
2.7612 V
Vin = Vout + 200 mV
ILoad = 200 mA
C4 Min
2.716 V
200 mA
Iload
Vout
0 mA
10 mV/div
Figure 9. Load Transient Response
Figure 10. Line Transient
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NCP2860
TYPICAL ELECTRICAL CHARACTERISTICS
(Vin = Vout + 0.5 V, Cin = Cout = 2.2 F, SET = GND, TA = 25°C, unless otherwise noted.)
Vin (0.5 V/div)
NCP2860DM277
NCP2860DM277
C4 Max
2.77 V
C4 Max
2.79 V
C4 Mean
712 mV
Vin (0.5 V/div)
Vout (0.5 V/div)
C4 Mean
711 mV
C4 Min
−30 mV
C4 Min
−30 mV
FAULT (2 V/div)
FAULT (2 V/div)
Vout (0.5 V/div)
Figure 12. Power−Up Response (Iload = 100 mA)
Figure 11. Power−Down Response (Iload = 100 mA)
NCP2860DM277
NCP2860DM277
C4 Max
2.84 V
C4 Max
2.84 V
Vout
(1 V/div)
C4 Mean
1.496 V
Vout
(1 V/div)
C4 Min
−40 mV
C4 Mean
1.374 V
C4 Min
0V
STDWN
(2 V/div)
STDWN
(2 V/div)
Figure 13. Shutdown/Power−Up
(Vin = Vout + 0.5 V, Iload = 50 mA)
Figure 14. Shutdown/Power−Up
(Vin = Vout + 0.5 V, Iload = 0 mA)
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NCP2860
DETAILED OPERATING DESCRIPTION
Internal Pass Transistor
The NCP2860 incorporates a 0.5 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.
If the output voltage is directly applied to the “SET’’ pin,
Vout = Vref = 1.244 V.
Vout
OUT
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.
R1
SET
R2
NCP2860
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.
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.
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 pullup
resistor is generally selected in the range of 100 k to
minimize the current consumption.
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:
Vout = (1 + R1/R2) * Vref
Therefore, as Vref typically equals 1.244 V:
Vout = 1.244 * (1 + R1/R2).
Application Information
It is recommended to use 2.2 F 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 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.
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:
Vout = [1.244 * (1 + R1/R2)] + (R1*Ilk) where Ilk is the
“SET’’ pin leakage current.
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NCP2860
IN
(2)
FAULT
(8)
R3
100 k
Fault
Detect
Error
Amplifier
BANDGAP
STDWN
−
+
Drive and
Current Limiting
SHUTDOWN
Rint1
(7)
Feedback
Selection
BATTERY
Thermal
Sensor
C1
2.2 F
OUT
OUTPUT
BUFFER
(1,4)
R1
Rint2
SET
C2
2.2 F
(5)
R2
GND
(3)
Figure 15. With External Output Voltage Adjustment
IN
(2)
FAULT
(8)
R3
100 k
Fault
Detect
Error
Amplifier
BANDGAP
STDWN
−
+
Drive and
Current Limiting
SHUTDOWN
Rint1
(7)
Thermal
Sensor
Rint2
GND
(3)
Figure 16. Application for 2.77 V Output Voltage
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(1,4)
C2
2.2 F
Feedback
Selection
BATTERY
C1
2.2 F
OUT
OUTPUT
BUFFER
SET
(5)
NCP2860
PACKAGE DIMENSIONS
Micro8
CASE 846A−02
ISSUE G
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.
D
HE
PIN 1 ID
E
e
b 8 PL
0.08 (0.003)
M
T B
S
A
S
SEATING
−T− PLANE
0.038 (0.0015)
MILLIMETERS
NOM
MAX
−−
1.10
0.08
0.15
0.33
0.40
0.18
0.23
3.00
3.10
3.00
3.10
0.65 BSC
0.40
0.55
0.70
4.75
4.90
5.05
DIM
A
A1
b
c
D
E
e
L
HE
MIN
−−
0.05
0.25
0.13
2.90
2.90
INCHES
NOM
−−
0.003
0.013
0.007
0.118
0.118
0.026 BSC
0.016
0.021
0.187
0.193
MIN
−−
0.002
0.010
0.005
0.114
0.114
MAX
0.043
0.006
0.016
0.009
0.122
0.122
0.028
0.199
A
A1
L
c
SOLDERING FOOTPRINT*
8X
1.04
0.041
0.38
0.015
3.20
0.126
6X
8X
4.24
0.167
0.65
0.0256
5.28
0.208
SCALE 8:1
mm Ǔ
ǒinches
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
Micro8 is a trademark of International Rectifier.
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 validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
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For additional information, please contact your
local Sales Representative.
NCP2860/D
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