RP171N-Y Series
150 mA 10 V Input LDO Regulator for Industrial Applications
NO.EA-342-160324
OUTLINE
The RP171x is a LDO regulator featuring 150 mA output current that is developed with CMOS process
technology. The RP171x offers the maximum input voltage of 10 V which makes it ideal for use in the industrial
equipments such as FAs and smart meters. The RP171x provides a supply current as low as Typ. 23 µA and
achieves fast-response characteristics. The RP171x offers an output voltage as low as 1.2 V. Compared to
existing high-speed lines, the RP171x provides excellent output voltage accuracy and output voltage temperature
coefficient.
Internally, the RP171x consists of a fold-back protection circuit and a thermal shutdown circuit. A standby mode
with ultra low supply current has been realized by a chip enable function.
The RP171x is available in a 5-pin SOT-23-5 package with high power dissipation.
This is a high-reliability semiconductor device for industrial application (-Y) that has passed both the screening
at high temperature and the reliability test with extended hours.
FEATURES
Input Voltage Range (Maximum Ratings) ···················· 2.6 V to 10 V (12 V)
Operating Temperature ···········································
−40°C
to 105°C
Supply Current ······················································ Typ. 23 µA (V
IN
= V
SET
+ 1.0 V)
Standby Current ··················································· Typ. 0.1 µA (V
IN
= 10.0 V, CE = “L”)
Output Voltage Range ····································· 1.2 V/1.5 V/1.8 V/2.5 V/2.8 V/3.0 V/3.3 V/3.4 V/5.0 V/6.0 V
Contact Ricoh sales representatives for other voltages.
Output Voltage Accuracy ········································ ±1.0%
Output Voltage Temperature Coefficient ····················· Typ. ±80 ppm/°C
Line Regulation ···················································· Typ. 0.02%/V
Dropout Voltage···················································· Typ. 0.4 V (I
OUT
= 150 mA, V
SET
= 2.8 V)
Ripple Rejection ··················································· Typ. 70 dB (f = 1 kHz)
Fold-back Protection Circuit ···································· Typ. 40 mA
Constant Slope Circuit (Soft-start Function)
Thermal Shutdown Circuit ······································· Stops at 165°C
Auto-discharge Function ········································· RP171xxxxD
Package ····························································· SOT-23-5
Ceramic Capacitor Compatible ································ 1.0 µF or more
APPLICATIONS
Industrial equipments such as FAs and smart meters
Equipments used under high-temperature conditions such as surveillance camera and vending machine
Equipments accompanied by self-heating such as motor and lighting
1
RP171N-Y
NO.EA-342-160324
BLOCK DIAGRAM
RP171xxxxB Block Diagram
RP171xxxxD Block Diagram
V
DD
V
OUT
V
DD
V
OUT
Vref
Current Limit
Thermal Shutdown
Vref
Current Limit
Thermal Shutdown
CE
GND
CE
GND
SELECTION GUIDE
The set output voltage, the auto-discharge function
*1
and the automotive class are user-selectable options.
Product Name
Package
Quantity per Reel
Pb Free
Halogen Free
RP171Nxx1
-TR-YE
SOT-23-5
3,000 pcs
Yes
Yes
xx: Specify the set output voltage (V
SET
) within the range of
1.2 V (12) / 1.5 V (15) / 1.8 V (18) / 2.5 V (25) / 2.8 V (28) / 3.0 V (30) / 3.3 V (33) / 3.4 V (34) /
5.0 V (50) / 6.0 V (60)
Contact Ricoh sales representatives for other voltages.
Select from (B) CE = Active-high without auto-discharge function or (D) CE = Active-high with Auto-
discharge function.
*1
Auto-discharge function quickly lowers the output voltage to 0 V by releasing the electrical charge accumulated in
the external capacitor when the chip enable signal is switched from the active mode to the standby mode.
2
RP171N-Y
NO.EA-342-160324
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
Unit
V
IN
V
CE
V
OUT
I
OUT
P
D
Tj
Tstg
*1
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Current
Power Dissipation (Standard Land Pattern)
*1
Junction Temperature
Storage Temperature Range
12
12
−0.3
to V
IN
+ 0.3
330
420
−40
to 125
−55
to 125
V
V
V
mA
mW
°C
°C
Refer to
PACKAGE INFORMATION
for detailed information.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent
damages and may degrade the life time and safety for both device and system using the device in the field. The
functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
IN
Item
Rating
Unit
Input Voltage
Operating Temperature Range
RECOMMENDED OPERATING CONDITIONS
2.6 to 10
−40
to 105
V
°C
Ta
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the recommended
operating conditions, even if when they are used over such conditions by momentary electronic noise or surge.
And the semiconductor devices may receive serious damage when they continue to operate over the
recommended operating conditions.
4
RP171N-Y
NO.EA-342-160324
ELECTRICAL CHARACTERISTICS
V
IN
= V
SET
+ 1.0 V, I
OUT
= 1 mA, unless otherwise noted.
The specifications surrounded by
RP171xxxxB/D
Symbol
are guaranteed by design engineering at –40°C
≤
Ta
≤
105°C.
(Ta = 25°C)
Item
Conditions
Min.
Typ.
Max.
Unit
1.5 V <
V
SET
V
OUT
Output Voltage
V
SET
≤
1.5
V
I
OUT
V
OUT
/
I
OUT
Ta = 25°C
−40°C ≤
Ta
≤
105°C
Ta = 25°C
−40
°
C
≤
Ta
≤
105°C
V
SET
x 0.99
V
SET
x0.965
−15
−53
150
V
SET
x 1.01
V
SET
x 1.03
15
45
V
mV
mA
Output Current
Load Regulation
Dropout Voltage
Supply Current
Standby Current
Line Regulation
Short Current Limit
CE Pull-down Current
CE Input Voltage “H”
CE Input Voltage “L”
Thermal Shutdown
Temperature
Thermal Shutdown
Released Temperature
Auto-discharge
Nch Tr. ON Resistance
(RP171xxxxD)
Junction Temperature
Junction Temperature
V
CE
= 0 V, V
IN
= 7.0 V
0.1 mA
≤
I
OUT
≤
150 mA
I
OUT
=150 mA
I
OUT
= 0 mA
V
IN
= 10.0 V, V
CE
= GND
V
SET
+ 0.5 V
≤
V
IN
≤
10.0 V
Note: When V
OUT
≤
2.1 V,
2.6 V
≤
V
IN
≤
10.0 V
V
OUT
= 0 V
5
45
mV
V
DIF
I
SS
Istandby
V
OUT
/
V
IN
Refer to the
Product-specific
Electrical Characteristics
23
0.1
±0.02
40
0.30
1.7
0.8
165
110
250
45
1.2
±0.25
µA
µA
%/V
mA
µA
V
V
°C
°C
Ω
I
SC
I
PD
V
CEH
V
CEL
T
TSD
T
TSR
R
LOW
All test items listed under
ELECTRICAL CHARACTERISTICS
are done under the pulse load condition (Tj
≈
Ta = 25°C).
5
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