Input Voltage Range (Maximum Rating):
1.4 to 5.5 Ｖ (Rating 6.5 V)
Output Voltage Range: Fi
xed Output Voltage Type: 1.0 to 3.6 V
Adjustable Output Voltage Type: 1.0 to 4.8 V
Output Current: 500
mA
Quiescent C
urrent: Typ. 80 μA
Output Noise Voltage: T
yp. V
SET
× 30 µVrms (I
OUT
= 100 mA)
Ripple Rejection: T
yp. 75 dB (1 kHz)
Drop Out Voltage： T
yp. 0.16 V (I
OUT
= 500 mA, V
SET
= 3.3 V)
Thermal Shutdown Function： T
yp. 165°C
Start-Up I
nrush Current Limit ： Typ. 160 mA
Foldback Protection
Soft-S
tart Time Adjustment Function (CSS adjustment),
Power-Good Function, Discharge Function
1/6
Power source for battery-powered equipment,
electrical home appliances and
portable communication equipment,
industrial equipment etc.
The Soft-Start time adjustment function, Power-good (PG) function makes power supply design at start-up easier.
Built-in Soft-Start time adjustment function and Power-Good (PG) function, and small package (1.2x1.2x0.4) even
though 500mA output current achieve the high-density mounting.
Lineup of adjustable output voltage type, Power-Good (PG) function type, and high heat dissipation package are ideal
for various considerations from the initial design stage.
KEY SPECIFICATIONS
PACKAGE：Unit（mm）
TYPICAL APPLICATIONS
APPLICATIONS
NR1600xxxxxB/E
(Fixed Output Voltage Type)
NR1600-EV-221216
500mA Low Dropout Voltage Regulator with
Soft-Start Time Adjustment and
Power-Good Function
DFN1212-6-GK
1.2 x 1.2 × 0.4
SOT-23-6-DD
2.9 x 2.8 × 1.1
HSOP-8-AC
5.2 x 4.4 × 1.45
NR1600xx000A/D
(Adjustable Output Voltage Type)
VIN
EN
CSS
VOUT
NR1600xx000A/D
C
OUT
C
SS
Control
Signal
FB
C
IN
GND
R
1
R
2
VIN
EN
CSS
VOUT
NR1600xxxxxB/E
C
OUT
C
SS
Control
Signal
PG
C
IN
GND
R
PG
Under
Development
Under
Development
2/6
NR1600-EV-221216
General Issue
Our Solution
An LDO with specified start-up time is desired under constraints of sequential control and start-up time.
When an LDO has large capacitive load, an inrush current at start-up is concern.
Set the slope with a capacitor to
match the power supply specifications
of the FPGA
Because NR1600 can adjust the slope of the output voltage with a capacitor, sequential control will be simplified.
NR1600 can change the Soft-Start time to limit the inrush current value at startup.
Primary
DC/DC
DC/DC1
NR1600
DC/DC2
FPGA
Analog
CPU
I/O
EN
VOUT
Time
IIN
In-Rush Current
Soft-Start Time
Set the In-Rush current value
with a capacitor
500mA Low Dropout Voltage Regulator with
Soft-Start Time Adjustment and
Power-Good Function
The Soft-Start time adjustment function, Power-good (PG) function makes power supply design at start-up easier.