R1155x Series
150 mA 24 V Input High Voltage Regulator
NO.EA-270-150702
OUTLINE
The R1155x is a CMOS-based 24 V input voltage regulator featuring 150 mA output that provides high output
voltage accuracy and low supply current. Internally, the R1155x consists of a voltage reference unit, an error
amplifier, and a resistor net for setting output voltage. As protection circuits, the R1155x contains a current limit
circuit, a fold-back protection circuit, a thermal shutdown circuit and a reverse current protection circuit.
The R1155x is available in the fixed output voltage type (R1155xxxxB), and the adjustable output voltage type
(R1155x001C). The output voltage accuracy for the fixed output voltage type is as high as ±2.0%.
The R1155x is offered in a 5-pin SOT-89-5 package and a 5-pin SOT-23-5 package.
FEATURES
Supply Current ········································· Typ. 7.5 µA (V
IN
= 6.0 V or 3.0 V)
Standby Current ········································ Typ. 0.1 µA
Output Current ·········································· Min. 150 mA (V
IN
= 6.0 V or 3.0 V)
Output Voltage Accuracy ····························· ±2.0%
Package ·················································· SOT-23-5, SOT-89-5
Input Voltage Range ·································· Max. 24.0 V
Output Voltage Range ································ Fixed Output Voltage Type: 2.5 V to 12.0 V
Adjustable Output Voltage Type: 2.5 V, 2.5 V to 23.0 V
using external resistor
Fold-back Protection Circuit ························· Typ. 30 mA
Thermal Shutdown Circuit
Reverse Current Protection Circuit
Ceramic Capacitor Capable ························· C
OUT
= 4.7 µF or more
APPLICATIONS
Power source for home appliances (refrigerators, rice cookers, electric water warmers, etc.)
Power source for in-car audio systems, in-car navigation systems, ETC systems, and reset circuits
Power source for laptop personal computers, digital TVs, cordless phones, and private LAN systems for
home, and reset circuits
Power source for copiers, printers, facsimiles, scanners, and reset circuits
1
R1155x
NO.EA-270-150702
SELECTION GUIDE
The output voltage, the output voltage type, and the package type for the ICs are user-selectable options.
Selection Guide
Product Name
R1155Nxxx-TR-FE
R1155Hxxx-T1-FE
Package
SOT-23-5
SOT-89-5
Quantity per Reel
3,000 pcs
1,000 pcs
Pb Free
Yes
Yes
Halogen Free
Yes
Yes
xxx: Designation of the output voltage (V
SET
)
For Fixed Output Voltage Type: 2.5 V (025) to 12 V (120) in 0.1 V steps
For Adjustable Output Voltage Type: 2.5 V (001) only
:
Designation of the output voltage type
(B) Fixed Output Voltage Type
(C) Adjustable Output Voltage Type
BLOCK DIAGRAMS
Reverse Current
Protection
VDD
Voltage
Reference
VOUT
VDD
Voltage
Reference
Reverse Current
Protection
VOUT
VFB
On/Off
Control
Thermal
Shutdown
Current
Limit
On/Off
Control
Thermal
Shutdown
Current
Limit
VCE
GND
VCE
GND
R1155xxxxB Block Diagram
(Fixed Output Voltage Type)
R1155x001C Block Diagram
(Adjustable Output Voltage Type)
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R1155x
NO.EA-270-150702
PIN DESCRIPTION
5
4
5
4
(mark side)
1
2
3
1
2
3
SOT-23-5 Pin Configuration
SOT-89-5 Pin Configuration
SOT-23-5 Pin Description
Pin No
1
2
3
4
5
Symbol
VOUT
GND
VDD
TP
1
VFB
2
CE
VR Output Pin
Ground Pin
Input Pin
R1155NxxxB
R1155N001C
3
Chip Enable Pin, Active-high
Test Pin
VR Adjustment Pin
Description
SOT-89-5 Pin Description
Pin No
1
2
3
4
5
Symbol
VOUT
GND
CE
TP
1
VFB
2
VDD
VR Output Pin
Ground Pin
Chip Enable Pin, Active-high
R1155HxxxB
R1155H001C
3
Input Pin
Test Pin
VR Adjustment Pin
Description
1
2
The TP pin must be connected to GND.
A 24 MΩ or less voltage setting resistor must be connected to the VFB pin.
3
As for the adjustable output voltage type (R1155N001C), please refer to
ADJUSTABLE OUTPUT VOLTAGE TYPE
SETTING.
3
R1155x
NO.EA-270-150702
PIN EQIVALENT CIRCUIT DIAGRAMS
Driver
V
OUT
CE
VOUT Pin Equivalent Circuit Diagram
V
OUT
VFB Pin Equivalent Circuit Diagram
V
OUT
TP
V
FB
TP Pin Equivalent Circuit Diagram
(R1155xxxxB)
VFB Pin Equivalent Circuit Diagram
(R1155x001C)
4
R1155x
NO.EA-270-150702
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings
Symbol
V
IN
V
CE
V
OUT
V
VFB
I
OUT
P
D
Tj
Tstg
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Voltage (VFB Pin)
Output Current
Power Dissipation (Standard Land Pattern)
1
Junction Temperature
Storage Temperature Range
SOT-23-5
SOT-89-5
−40
to 125
−55
to 125
Item
Rating
−0.3
to 26
−0.3
to V
IN
+0.3
−0.3
to 26
−0.3
to 26
350
420
900
Unit
V
V
V
V
mA
mW
C
C
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
Recommended Operating Ratings
Symbol
Ta
V
IN
Input Voltage
RECOMMENDED OPERATING RATINGS
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating ratings. The semiconductor devices cannot operate normally over the recommended
operating ratings, even if when they are used over such ratings by momentary electronic noise or surge. And the
semiconductor devices may receive serious damage when they continue to operate over the recommended
operating ratings.
Item
Ratings
−40
to 105
3.5 to 24
Unit
°C
V
Operating Temperature Range
1
Refer to
POWER DISSIPATION
in
SUPPLEMENTSRY ITEMS
for detail information.
5
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