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NCP4687 Datasheet

LDO Linear Voltage Regulator

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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 RDS(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
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 @ Vout > 1.8 V
Output noise : 40 mVrms
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
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
C1
1.0 mF
CE SENSE
GND
C2
1.0 mF
http://onsemi.com
MARKING
DIAGRAMS
SOT89−5
CASE 528AB
1
XXX
XZZ
XDFN6
CASE 711AH
XX
MM
1
SOT−23−5
CASE 1212
XXXMM
1
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.
Figure 1. Typical Application Schematic
© Semiconductor Components Industries, LLC, 2014
December, 2014 − Rev. 3
1
Publication Order Number:
NCP4687/D


  ON Semiconductor Electronic Components Datasheet  

NCP4687 Datasheet

LDO Linear Voltage Regulator

No Preview Available !

NCP4687xxx
Vin
Vref
CE
Current Limit &
Thermal Protection
NCP4687
Vout
Vin
SENSE
Vref
NCP4687Dxx
CE
Current Limit &
Thermal Protection
GND
Figure 2. Simplified Schematic Block Diagram
PIN FUNCTION DESCRIPTION
Pin No.
SOT−23−5
Pin No.
SOT−89−5
Pin No.
DFN1212
146
223
334
412
551
5
*EP
Pin Name
VIN
GND
CE
SENSE
VOUT
NC
EP
Description
Input pin
Ground pin
Chip enable pin (“H” active)
Output Voltage Sensing
Output pin
Non Connected
Exposed Pad (leave floating or connect to GND)
Vout
SENSE
GND
http://onsemi.com
2


Part Number NCP4687
Description LDO Linear Voltage Regulator
Maker ON Semiconductor
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