LDO Regulator - Ultra-Low
Iq, Dual Power Mode
50nA, 80mA
NCP171
The NCP171 is a Dual mode LDO offering up to 80 mA in Active
Mode and as low as 50 nA of Iq in Low Power Mode. The Dual Mode
function is selectable with the ECO pin allowing for dynamic
switching between Active and Low Power Modes, ideal in long life
battery powered applications.
The output Voltage in Low Power mode can be lowered by an
internally factory programmed value ranging 50 mV, 100 mV, 150 mV
or 200 mV with respect to the nominal output voltage in Active Mode.
This feature further lowers the application consumption in sleep mode.
The NCP171 is in the SLIQ (Super Low Iq) LDO family and is
available in small XDFN4 1.2 x 1.2 package.
Features
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Operating Input Voltage Range: 1.7 V to 5.5 V
Output Voltage Range: 0.6 V to 3.3 V (50 mV steps)
Low Power Mode / Active Mode Externally Controlled by ECO pin
Internally Factory Programmable Output Voltage Offset for Low
Power/Active Mode to 50 mV, 100 mV, 150 mV, 200 mV
Quiescent Current of 50 nA at No Load, (Low Power mode)
Maximum Current 80 mA in Active Mode and 5 mA in Low Power
Mode
Low Dropout: 41 mV Typ. at 80 mA (Vout = 3.3 V)
±2% Output Voltage Accuracy in Active Mode
High PSRR: 65 dB at 1 kHz in Active Mode
Active Output Discharge for Fast Output Turn−Off
Current Limitation, Thermal Shutdown
Available in Small XDFN4 1.2x1.2 Package
These are Pb−Free Devices
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1
XDFN4 1.2x1.2
AM SUFFIX
CASE 711BC
MARKING DIAGRAM
XXM
1
XX = Specific Device Code
M = Date Code
PIN CONNECTIONS
ENA
4
3
IN
2
OUT
GND
ECO
1
(Top View)
Typical Applications
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IoT
RFID
Portable Communication Equipment
Consumer Electronics
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 20 of this data sheet.
Figure 1. Typical Application Schematic
© Semiconductor Components Industries, LLC, 2018
December, 2019 − Rev. 2
1
Publication Order Number:
NCP171/D
NCP171
Active Mode part
ECO
Current Limit &
Thermal Shutdown
Low Power part
Vin
Vout
Active Discharge
Vref
Voltage Scaling
ENA
GND
Figure 2. Simplified Schematic Block Diagram
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
XDFN4
Pin Name
Description
1
ECO
Low Power and Active mode control pin. Pulling this pin to ground switches the device into
Low Power mode and pushing this pin to output voltage switches the device into Active mode.
2
OUT
Output pin
3
IN
4
ENA
Enable pin. Driving ENA above 1.2 V turns on the regulator. Driving ENA below 0.4 V puts the
regulator into shutdown mode.
5(EP)
GND
Ground
Input pin
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2
NCP171
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
VIN
6.0
V
Output Voltage
VOUT
−0.3 to VIN
V
Enable pin
VENA
−0.3 to VIN
V
ECO pin
VECO
−0.3 to VIN
V
Output Current
IOUT
120
mA
PD
400
mW
TJ(MAX)
85
°C
TSTG
−55 to 125
°C
ESD Capability, Human Body Model (Note 2)
ESDHBM
2000
V
ESD Capability, Machine Model (Note 2)
ESDMM
200
V
Input Voltage (Note 1)
Power Dissipation XDFN4
Maximum Junction Temperature
Storage Temperature
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. Refer to ELECTRICAL CHARACTERISTIS and APPLICATION INFORMATION for Safe Operating Area.
2. 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
Table 3. THERMAL CHARACTERISTICS (Note 3)
Rating
Thermal Characteristics, XDFN4
Thermal Resistance, Junction−to−Air
Symbol
Value
Unit
RqJA
170
°C/W
3. This data was derived by thermal simulations for a single device mounted on the 40 mm x 40 mm x 1.6 mm FR4 PCB with 2−ounce 800 sq
mm copper area on top and bottom.
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3
NCP171
Table 4. ELECTRICAL CHARACTERISTICS −40°C ≤ TJ ≤ 85°C; VIN = VOUTNOM + 0.5 V or 1.7 V, whichever is greater; IOUT =
100 mA at Low Power Mode / 1 mA at Active Mode, CIN = COUT = 1.0 mF, unless otherwise noted. Typical values are at TJ = +25°C. (Note 4)
Parameter
Test Conditions
Operating Input Voltage
Output Voltage
Load Regulation
Min
Max
Unit
VIN
1.7
Typ
5.5
V
VOUTAC =
VOUTLP +
VOFFSET
x0.97
x1.03
V
−40°C ≤ TJ ≤ 85°C,
IOUT < 5 mA
Low Power Mode (LP)
ECO = 0
NCP171A3MXxxxyyy
−40°C ≤ TJ ≤ 85°C,
IOUT < 5 mA
Low Power Mode (LP)
ECO = 0
NCP171AMXxxxyyy
x0.95
x1.05
V
TJ = +25°C,
0 ≤ IOUT
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