Datasheet
Industrial NR1640
200mA Ultra-low Noise Voltage Regulator
- 1 -
Ver.1.0
KEY SPECIFICATIONS OVERVIEW
Input Voltage Range (Maximum Rating)
：
2.7 V to 5.5 V (6.5 V)
Operating Temperature Range： −40°C to 125°C
Output Voltage Range： 2.5 V to 4.8 V
Output Current： 200 mA
Quiescent Current： Typ.350 µA
Output Noise Voltage： Typ.6 µVrms (I
OUT
= 100 mA)
Ripple Rejection： Typ.80 dB (f = 1 kHz)
Typ.80 dB (f = 100 kHz)
Dropout Voltage： Typ.0.13 V
(I
OUT
= 200 mA, V
SET
= 3.3 V)
Thermal Shutdown Function： Typ.165°C
Slope of Output Voltage at Start-up：
55
/ 110 / 220 / 440 µs/V
Selectable from 4 types
Auto-discharge Function
：
Selectable by product name
The NR1640 is an ultra-low noise, high PSRR voltage
regulator featuring 200 mA output current and 5.5 V
maximum input voltage.
With noise characteristics of 6 μVrms and high ripple
rejection of 80 dB or more @100 kHz, high quality power
can be supplied, ideal for high precision sensing
systems where noise is an issue.
The slope of output voltage at startup can be selected
from 4 types.
These options will meet the demand of suppression of
inrush current and start-up slope requirement. In
addition, the auto discharge function option will
contribute to make the output shutdown fast to
discharge output capacitance with internal discharge
FET.
SOT-23-5-DC
2.9 × 2.8 × 1.1(㎜)
Industrial equipment which requires noise immunity such
as FA and smart meter.
Equipment used under high-
temperature conditions such
as surveillance camera and vending machine.
Equipment accompanied by self-heating such as motor
and lighting.
C
IN
NR1640DC
VIN
VOUT
EN
GND
C
OUT
C
IN
= Ceramic 1.0 µF
C
OUT
= Ceramic 1.0 µF
V
OUT
Control
Signal
V
IN
= 5V, V
SET
= 3.3V
APPLICATIONS
TYPICAL APPLICATIONS
PSRR TYPICAL CHARACTERISTICS
Datasheet
Industrial NR1640 series
- 2 -
Ver.1.0
■ PRODUCT NAME INFORMATION
NR1640
aa
bbb
c
dd
e
Description of configuration
composition
Item
Description
aa
Package Code
Indicates the package. Refer to the order information.
bbb Output Voltage
Set Output Voltage (V
SET
)
We have a lineup of major voltages in the range of 2.5 V (250) to 4.8 V (480).
c Version
Indicates Slope of Output Voltage at Start-up and the selection of the auto discharge
function.
dd Packing Refer to the packing specifications.
e Grade Indicates the quality grade.
Version
c Slope of Output Voltage at Start-up Auto-discharge Function
A 55 µs/V Yes
B 110 µs/V Yes
C
220 µs/V
Yes
D 440 µs/V Yes
E 55 µs/V No
F
110 µs/V
No
G 220 µs/V No
H 440 µs/V No
Grade
e
Applications
Operating Temperature Range
Test Temperature
D
Industrial equipment
and Social infrastructures
−40°C to 125°C
25°C, 125°C
■ ORDER INFORMATION
PRODUCT NAME PACKAGE RoHS
HALOGEN-
FREE
Plating
Composition
MARKING
WEIGHT
(mg)
Quantity per Reel
(pcs)
NR1640DCbbbcE1D SOT-23-5-DC Yes Yes Sn Reference 15 3000
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Note: Contact our sales representatives for other voltages.