NCP4687
500 mA, High PSRR, LDO
Linear Voltage Regulator
The NCP4687 is a CMOS 500 mA LDO linear voltage regulator
with high output voltage accuracy which features a high ripple
rejection, low supply current with low dropout and chip enable with
built−in low R
DS(on)
NMOS transistor for fast output capacitor
discharging as option. The device is composed of the voltage reference
unit, error amplifier, resistor divider for output voltage sensing or
precise output voltage setting. The current limit and thermal shutdown
makes the device very suitable for industrial applications and portable
communication equipments.
Features
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MARKING
DIAGRAMS
1
XXX
XZZ
•
•
•
•
•
•
•
•
•
Operating Input Voltage Range: 2.5 V to 5.25 V
Output Voltage Range: 0.7 to 3.6 V (available in 0.1 V steps)
±0.8%
Output Voltage Accuracy @ V
out
> 1.8 V
Output noise : 40
mV
rms
Line Regulation: 0.02%/V
Current Limit Circuit
High PSRR: 75 dB at 1 kHz, 70 dB at 10 kHz
Thermal Shutdown
Available in SOT−23−5, SOT−89−5 and uDFN 1.2 x 1.2 mm
Packages
•
These Devices are Pb−Free and are RoHS Compliant
Typical Applications
SOT89−5
CASE 528AB
XDFN6
CASE 711AH
1
XX
MM
XXXMM
SOT−23−5
CASE 1212
1
•
•
•
•
Home Appliances, Industrial Equipment
DVB−T and DVB−S Receivers
Car Audio Equipment, Navigation Systems
Notebook Adaptors, LCD TVs, Cordless Phones and Private LAN
Systems
NCP4687x
VIN
VIN
VOUT
VOUT
XX, XXX= Specific Device Code
ZZ
= Lot Code
MM
= Date Code
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
CE
C1
1.0
mF
GND
SENSE
C2
1.0
mF
Figure 1. Typical Application Schematic
©
Semiconductor Components Industries, LLC, 2014
1
December, 2014 − Rev. 3
Publication Order Number:
NCP4687/D
NCP4687
NCP4687xxx
NCP4687Dxx
Vin
Vout
SENSE
Vin
Vout
SENSE
Vref
Vref
CE
Current Limit &
Thermal Protection
CE
Current Limit &
Thermal Protection
GND
GND
Figure 2. Simplified Schematic Block Diagram
PIN FUNCTION DESCRIPTION
Pin No.
SOT−23−5
1
2
3
4
5
Pin No.
SOT−89−5
4
2
3
1
5
Pin No.
DFN1212
6
3
4
2
1
5
*EP
Pin Name
VIN
GND
CE
SENSE
VOUT
NC
EP
Input pin
Ground pin
Chip enable pin (“H” active)
Output Voltage Sensing
Output pin
Non Connected
Exposed Pad (leave floating or connect to GND)
Description
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2
NCP4687
ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage
Output Voltage
Chip Enable Input
Power Dissipation SOT−23−5
Power Dissipation uDFN 1.2 x 1.2 mm
Power Dissipation SOT−89−5
Junction Temperature
Storage Temperature
ESD Capability, Human Body Model (Note 1)
ESD Capability, Machine Model (Note 1)
T
J
T
STG
ESD
HBM
ESD
MM
Symbol
V
IN
V
OUT
V
CE
P
D
Value
0−6
−0.3 to V
IN
− 0.3
−0.3 − 6
420
600
900
−40 to 150
−55 to 125
2000
200
°C
°C
V
V
Unit
V
V
V
mW
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AEC−Q100−002 (EIA/JESD22−A114)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)
Latchup Current Maximum Rating tested per JEDEC standard: JESD78
THERMAL CHARACTERISTICS
Rating
Thermal Characteristics, SOT−23−5
Thermal Resistance, Junction−to−Air
Thermal Characteristics, uDFN 1.2x1.2
Thermal Resistance, Junction−to−Air
Thermal Characteristics, SOT−89−5
Thermal Resistance, Junction−to−Air
Symbol
R
qJA
R
qJA
R
qJA
Value
238
167
111
Unit
°C/W
°C/W
°C/W
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3
NCP4687
ELECTRICAL CHARACTERISTICS
−40°C
≤
T
A
≤
85°C; C
IN
= C
OUT
= 1.0
mF,
unless otherwise noted. Typical values are at
T
A
= +25°C.
Parameter
Operating Input Voltage
Test Conditions
V
OUT
≤
1.5 V
V
OUT
> 1.5 V
Output Voltage
Ta = 25°C, V
OUT
> 1.8 V
−40°C < Ta < 85°C, V
OUT
> 1.8 V
Ta = 25°C, V
OUT
≤
1.8 V
−40°C < Ta < 85°C, V
OUT
≤
1.8 V
Output Voltage Temp.
Coefficient
Load Regulation
Line Regulation
Dropout Voltage
−40°C < Ta < 85°C, V
OUT
> 1.8 V
−40°C < Ta < 85°C, V
OUT
≤
1.8 V
1 mA < I
OUT
≤
500 mA
Set V
OUT
+ 0.5 V < V
IN
< 5.25 V
I
OUT
= 500 mA
0.7 V
≤
V
OUT
< 0.8 V
0.8 V
≤
V
OUT
< 0.9 V
0.9 V
≤
V
OUT
< 1.0 V
1.0 V
≤
V
OUT
< 1.2 V
1.2 V
≤
V
OUT
< 1.4 V
1.4 V
≤
V
OUT
< 1.8 V
1.8 V
≤
V
OUT
< 2.1 V
2.1 V
≤
V
OUT
< 2.5 V
2.5 V
≤
V
OUT
< 3.0 V
3.0 V
≤
V
OUT
< 3.6 V
Output Current
Short Current Limit
Quiescent Current
V
OUT
= 0 V
I
OUT
= 0 mA
V
OUT
> 1.5 V
V
OUT
≤
1.5 V
Standby Current
CE Pin Pull−Down Current
CE Pin Threshold Voltage
CE Input Voltage “H”
CE Input Voltage “L”
Power Supply Rejection
Ratio
V
OUT
≤
2.0 V @ V
IN
= 3.0 V,
V
OUT
> 2.0 V @ V
IN
=
= Set V
OUT
+ 1.0 V,
DV
IN_PK−PK
= 0.2 V,
I
OUT
= 30 mA
f = 1 kHz
f = 10 kHz
V
IN
= V
IN max
, V
CE
= 0 V
I
STB
I
PD
V
CEH
V
CEL
PSRR
75
70
1.0
I
OUT
I
SC
I
Q
500
50
80
75
0.1
0.3
1.0
0.6
V
IN
0.4
dB
mA
mA
V
115
Load
Reg
Line
Reg
V
DO
V
OUT
Symbol
V
IN
Min
2.5
V
OUT
+ 1
x0.992
x0.985
−18
−55
±30
±100
1
0.02
0.58
0.52
0.45
0.42
0.35
0.31
0.27
0.25
0.23
0.22
20
0.1
0.88
0.80
0.70
0.64
0.53
0.48
0.41
0.38
0.34
0.32
mA
mA
mA
mV
%/V
V
Typ
Max
5.25
5.25
x1.008
x1.015
+18
+55
V
V
mV
mV
ppm/°C
Unit
V
Output Noise Voltage
I
OUT
= 30 mA , f = 10 Hz to 100 kHz, V
OUT
> 1.8 V
I
OUT
= 30 mA, f = 10 Hz to 100 kHz, V
OUT
≤
1.8 V
V
NOISE
20 x
V
OUT
40 x
V
OUT
165/65
mV
rms
Thermal Shutdown /
Hysteresis
Auto−discharge N−MOS
Resistance
V
IN
= 4.0 V, V
CE
= 0.0 V (Note 2)
R
DS(on)
°C
W
60
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
2.
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NCP4687
TYPICAL CHARACTERISTICS
0.8
V
OUT
, OUTPUT VOLTAGE (V)
V
OUT
, OUTPUT VOLTAGE (V)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
100
200
300
400
500
600
700
800
I
OUT
, OUTPUT CURRENT (mA)
1.7 V
2.7 V
3.5 V
V
IN
= 1.4 V
3
2.5
V
IN
= 4.0 V
2
1.5
3.5 V
1
0.5
0
0
100
200
300
400
500
600
700
800
900
I
OUT
, OUTPUT CURRENT (mA)
3.0 V
Figure 3. Output Voltage vs. Output Current
0.7 V Version
4
V
OUT
, OUTPUT VOLTAGE (V)
V
OUT
, OUTPUT VOLTAGE (V)
3.5
3
2.5
2
1.5
1
0.5
0
0
100
200
300
400
500
600
700
800
V
IN
= 4.1 V
4.6 V
0.8
0.7
0.6
0.5
0.4
0.3
Figure 4. Output Voltage vs. Output Current
2.5 V Version
1 mA
30 mA
0.2
0.1
0
0
1
2
3
4
5
6
I
OUT
= 50 mA
I
OUT
, OUTPUT CURRENT (mA)
V
IN
, INPUT VOLTAGE (V)
Figure 5. Output Voltage vs. Output Current
3.6 V Version
3
V
OUT
, OUTPUT VOLTAGE (V)
2.5
2
1.5
1
0.5
0
V
OUT
, OUTPUT VOLTAGE (V)
4
3.5
3
2.5
2
1.5
1
0.5
0
0
Figure 6. Output Voltage vs. Input Voltage 0.7 V
Version
1 mA
30 mA
I
OUT
= 50 mA
0
1
2
3
4
V
IN
, INPUT VOLTAGE (V)
5
6
1 mA
30 mA
I
OUT
= 50 mA
1
2
3
4
V
IN
, INPUT VOLTAGE (V)
5
6
Figure 7. Output Voltage vs. Input Voltage 2.5 V
Version
Figure 8. Output Voltage vs. Input Voltage 3.6 V
Version
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