R1500x Series
500mA 24V Input VR
The R1500x Series are CMOS-based voltage regulators featuring 500mA output current and 24V input voltage. R1500x provides high
input voltage operation and low on-resistance (at V
OUT
= 10V, below 0.6Ω) because of using CMOS transistor. In addition to a fold-back
protection circuit built into conventional regulators, R1500x contains a thermal shutdown circuit. Besides the low supply current by
CMOS, the operating temperature is -40°C to 105°C and the maximum input voltage is 24V, the R1515x series are very suitable for
power source of car accessories.
FEATURES
•
Supply Current (I
SS
) ························Typ. 70μA (V
IN
=SET V
OUT
+1V)
•
Standby Current (I
standby
) ·················Typ. 0.1μA (V
IN
=24V, CE="L")
•
Dropout Voltage (V
DIF
) ····················Typ. 0.115V (I
OUT
=200mA, V
OUT
=5V)
•
Input Voltage Range (V
IN
) ···············4V to 24V (Absolute maximum rating: 36V)
•
Ripple Rejection (RR)·····················Typ. 60dB (f=1kHz, V
OUT
<
6V)
=
•
•
Typ. 50dB (f=1kHz, V
OUT
> 6V)
Output Voltage Range (V
OUT
)··········3.0V to 12.0V (internally fixed)
Output Voltage Accuracy ················± 2%
•
Temp. coeff of Output Voltage ··················· Typ.
±100ppm/°C
•
Line Regulation········································ Typ. 0.05%/V
•
Fold-back Protection Circuit····················· Current limit Typ. 65mA
•
Thermal Shutdown Circuit ······················· Stops at Typ. 160°C.
•
Package······················································ SOT-89-5,TO-252-5-P2
•
Ceramic capacitors can be used. ············ 10μF or more
BLOCK DIAGRAM
R1500xxxxB
Thermal Shutdown
Circuit
V
DD
V
OUT
Vref
Short
Current Limit
Protection
CE
GND
SELECTION GUIDES
Package
SOT-89-5
TO-252-5-P2
Quantity per Reel
Part No.
1,000 pcs
R1500H.xxx B-T1-F
3,000 pcs
R1500J.xxx B-T1-F
.xxx
: Specify the output voltage within the range 3.0V (.030.) to 12.0V (.120.)
in 0.1V steps
PACKAGES (Top View)
SOT-89-5
5
4
TYPICAL CHARACTERISTIC
TO-252-5-P2
R1500x120B
14
Output Voltage vs. Output Current
Output Voltage V
OUT
(V)
12
10
8
6
4
2
0
0
200
400
600
800
Output Current I
OUT
(mA)
1000
V
IN=
12.5V
V
IN=
13.0V
V
IN=
15.0V
V
IN=
16.0V
1
2
3
1
2
3
4
5
1
2
3
4
5
V
DD
GND
∗
GND
∗
CE
V
OUT
1
2
3
4
5
V
DD
GND
∗
GND
∗
CE
V
OUT
∗
) The GND pin must be wired together when it is mounted on board
APPLICATIONS
•
Power source for home appliances such as refrigerators, rice cookers, electric water warmers, etc
•
Power source for car audio equipment, car navigation systems, ETC systems, etc
•
Power source for laptop personal computers, digital TVs, cordless phones, and private LAN systems for home, etc
•
Power source for office equipment machines such as copiers, printers, facsimiles, scanners, etc
No.EK-151-091101
CMOS Voltage Regulator
R1500x Series
CMOS Voltage Regulator
Voltage Regulator with 500mA Output Current and 24V Input Voltage
MAXIMUM INPUT VOLTAGE 24V
The CMOS type regulator has been introduced into the
high input voltage area where only bipolar type could
previously operate.
CMOS type high input voltage area
36
ADOPTION OF DMOS PROCESS
The DMOS (Double Diffused MOS) transistor adopted by
R1500x is characterized by a double diffusion structure
which comprises a low density n-type (channel) diffused
layer and a high density p-type (sources) diffused layer
from the edge of the gate electrode. The R1500x series
possess outstanding properties of high operating voltage
and low on-resistance, which have been achieved by the
channel length scaled down to submicron dimensions
and decreased thickness of the gate oxide film.
Maximum input voltage (V)
24
R1510S
R1515x R1514x
R1150H
R1154x
R1500x
R1501x
R1152N external
output transistor type
18
16
R1190x
R1170x RP131x
R1172x
RP100x
0
MAXIMUM OPERATING AMBIENT
TEMPERATURE 105°C
Unlike Ricoh’s conventional regulators, the operating
ambient temperature range of the R1500x Series is rated
from -40°C to 105°C that makes it suitable for use in
automotive and industrial applications involving higher
temperatures.
5.25
R1111N
CMOS area
8
R1114x
6.5
6
R1171J
R1171s
RP102x
CMOS type large current
range
0 50 150 200 300 400 500 600
800
1000 1200 1400 1500 1600
Output current (mA)
1800
2000
Thermal Shutdown Circuit
The Thermal Shutdown Circuit shown in the block diagram detects an increase in temperature, stops operation, and protects the regulator from
being damaged by a short circuit in the output pin (V
OUT
) and ground pin (GND).
The Thermal Shutdown Circuit stops operation of the regulator when the junction temperature of the regulator exceeds 160°C. Moreover, when the junction
temperature decreases to a level below 135°C after the regulator has stopped, the regulator resumes to normal operation.
As a result, the operation of the Thermal Shutdown Circuit causes the regulator repeatedly to turn OFF and ON till the causes of overheating are
removed. As a consequence, a pulse shaped output voltage occurs. Care should be taken to prevent this situation.
In the datasheet it is shown as a thermal shutdown detection temperature (T
TSD
) and a thermal shutdown release temperature (T
TSR
).
Products with a built-in Thermal Shutdown Circuit
R1150H
R1514x
R1154x
R1515x
R1170x
RP131x
R1171x
RP170x
R1172x
RP171x
R1173x
R1190x
R1191x
R1500x
R1501x
The currently available information as of December 2009 is provided in this New Product News.
EK-151-08091101
Embedded System
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EEWORLD
