R1517x Series
500 mA 36V Input Low Supply Current LDO
NO. EA−304−201125
OUTLINE
R1517x is a CMOS-based LDO that specifically designed featuring 500 mA output current and 36 V input voltage.
In addition to a conventional regulator circuit, R1517x consists of a constant slope circuit as a soft-start function,
a fold-back protection circuit, a short current limit circuit, and 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 36 V, the
R1517x is very suitable for power source of car accessories. R1517x supports the internal fixed output voltage
type of R1517xxxxB/D/E/F, and the output voltage of R1517x001C can adjust the output voltage be set with an
external resistor, and the setting range is from 2.5V to Max 20V. As for the soft-start time, R1517x is fixed internal
in R1517xxxxB/C/D and is set to 120 µs (Typ). And the soft-start time in R1517xxxxE/F is adjustable by external
capacitors. R1517x supports the auto-discharge function at standby in R1517xxxxD/F. R1517x is available in two
packages for ultra-high wattage: HSOP-6J and TO-252-5-P2.
FEATURES
Input Voltage Range (Maximum Rating) ················ 3.5 V to 36.0 V (50.0V)
Operating Temperature Range ···························· −40°C to 105°C
Supply Current ················································· Typ. 18 µA
Standby Current ··············································· Typ. 0.1 µA
Dropout Voltage ··············································· Typ. 0.35 V (IOUT = 500 mA, VOUT = 5.0 V)
Output Voltage Accuracy ···································· ±0.8% (VOUT ≤ 5.0 V)
Line Regulation ················································ Typ. 0.01%/V
Packages ······················································· HSOP-6J, TO-252-5-P2
Output Voltage Range ······································· R1517xxxxB/D/E/F: 2.5 V/3.3 V/3.4 V/5.0 V/ 8.5V
R1517x001C: Adjustable from 2.5 V to 20.0 V with External
Resistors.
Feedback Voltage: 2.5 V
Built-in Short Current Limit Circuit ························ Typ. 75 mA
Built-in Fold-Back Protection Circuit ······················ Min. 500 mA
Built-in Thermal Shutdown Circuit ························ Typ. 160°C
Built-in Soft-start Circuit ····································· Typ.120 µs
R1517xxxxE/F: Adjustable Time Setting with External
Capacitors.
Usable Ceramic Capacitors ································ R1517xxxxB/D/E/F: 0.1 µF or more
R1517x001C: 1.0 µF or more
1
R1517x
NO. EA−304−201125
APPLICATIONS
Power source for home appliances such as refrigerators, rice cookers, electric water warmers.
Power source for notebook PCs, digital TVs, telephones, private LAN systems.
Power source for office equipment such as copiers, printers, facsimiles, scanners, and projectors
BLOCK DIAGRAMS
R1517xxxxB
VDD
Internal VR
R1517x001C
VOUT
VDD
Soft
Start
Internal VR
VFB
Soft
Start
Vref
Vref
Current Limit
Thermal Shutdown
CE
VOUT
GND
Current Limit
Thermal Shutdown
CE
GND
R1517xxxxE
R1517xxxxD
VOUT
VDD
VDD
Internal VR
Internal VR
Soft
Start
Soft
Start
DELAY
Vref
Current Limit
Thermal Shutdown
CE
GND
CE
VOUT
Vref
Current Limit
Thermal Shutdown
GND
R1517xxxxF
VDD
Internal VR
DELAY
CE
VOUT
Soft
Start
Vref
Current Limit
Thermal Shutdown
GND
2
R1517x
NO. EA−304−201125
SELECTION GUIDE
The output voltage, version, and package type for this device can be selected at the user’s request.
Product Name
Package
Quantity per Reel
Pb Free
Halogen Free
R1517Sxx1∗-E2-FE
HSOP-6J
1,000 pcs
Yes
Yes
R1517Jxx1∗-T1-FE
TO-252-5-P2
3,000 pcs
Yes
Yes
xx: Specify the set output voltage (VSET)
2.5 V (25) / 3.3 V (33) / 3.4 V (34) / 5.0 V (50) / 8.5 V (85)
Adjustable output voltage setting type is fixed to (00)
Note: R1517x001C-T1-#E only support
∗ : Specify the version with desired functions
B: No auto-discharge function
C: No auto-discharge function / Adjustable output voltage setting
D: Auto-discharge function
E: No auto-discharge function / Adjustable soft-start time setting
F: Auto-discharge function / Adjustable soft-start time setting
Auto-Discharge function quickly lowers the output voltage to 0 V by releasing the electrical charge in the external
capacitor when the chip enable signal is switched from the active mode to the standby mode.
3
R1517x
NO. EA−304−201125
PIN DESCRIPTION
6
5
4
*1
1
2
3
1
HSOP-6J
HSOP-6J
Pin No.
VDD
2
GND
3
Input Pin
Ground Pin
No Connection
R1517SxxxB/D
VFB
Feedback Pin
R1517S001C
Soft-start Time Pin
R1517SxxxE/F
CE
5
GND
Ground Pin
6
VOUT
Output Pin
2
5
Description
4
1
4
NC
DELAY
TO-252-5-P2
Pin No.
3
TO-252-5-P2
Symbol
1
2
Chip Enable Pin, Active-high
Symbol
Description
VDD
Input Pin
NC
No Connection
R1517JxxxB/D
VFB
Feedback Pin
R1517J001C
Adjustable Soft-start Time Pin
R1517JxxxE/F
DELAY
3
GND
4
CE
5
VOUT
Ground Pin
Chip Enable Pin, Active-high
Output Pin
*1 The
tab on the bottom of the package enhances thermal performance and is electrically connected to GND (substrate
level). It is recommended that the tab be connected to the ground plane on the board, or otherwise be left open.
4
R1517x
NO. EA−304−201125
PIN EQUIVALENT CIRCUIT DIAGRAMS
Driver
CE
VOUT
VOUT Pin
CE Pin
Internal VR
VFB
DELAY
DELAY Pin (R1517xxxxE/F)
VFB Pin (R1517x001C)
5
R1517x
NO. EA−304−201125
ABSOLUTE MAXMUM RATINGS
Symbol
VIN
Item
Input Voltage
Unit
−0.3 to 50
V
60
V
VIN
Peak Input
VCE
Input Voltage (CE Pin)
−0.3 to 50
V
VFB
Input Voltage (VFB Pin)
−0.3 to 50
V
VOUT
Output Voltage
−0.3 to VIN + 0.3 ≤ 50
V
PD
Ta
Tstg
Voltage*1
Rating
Power Dissipation
(HSOP-6J)*2
Power Dissipation
(TO-252-5-P2)*2
Standard Land Pattern
1700
Ultra High Wattage Land Pattern
2700
Standard Land Pattern
1900
Ultra High Wattage Land Pattern
3800
mW
Operating Temperature Range
−40 to 105
°C
Storage Temperature Range
−55 to 125
°C
*1
Duration time = 200 ms
*2
Refer to PACKAGE INFORMATION for detailed information.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damage 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.
6
R1517x
NO. EA−304−201125
ELECTRICAL CHARACTERISTICS
VIN = VSET + 1.0 V, IOUT = 1 mA, CIN = COUT = 0.1 µF, unless otherwise noted.
The specifications surrounded by
are guaranteed by design engineering at -40°C ≤ Ta ≤ 105°C.
R1517xxxxB/D
Symbol
VIN
(Ta = 25°C)
Item
Conditions
Ta = 25°C
VOUT
Max.
Unit
3.5
36
V
VSET ≤ 5.0 V
×0.992
×1.008
V
VSET > 5.0 V
×0.99
×1.01
V
VSET ≤ 5.0 V
×0.982
×1.018
V
VSET > 5.0 V
×0.98
×1.02
V
Input Voltage
Output Voltage
−40°C ≤ Ta ≤ 105°C
Min.
Typ.
∆VOUT
/∆IOUT
Load Regulation
VIN = VSET + 2.0 V,
1mA ≤ IOUT ≤ 250 mA
VIN = VSET + 2.0 V,
1mA ≤ IOUT ≤ 500 mA
VDIF
Dropout Voltage
IOUT = 500 mA
ISS
Supply Current
IOUT = 0 mA
18
36
µA
Istandby
Standby Current
VCE = 0 V
0.1
2.0
µA
∆VOUT
/∆VIN
Line Regulation
VSET + 0.5 V ≤ VIN ≤ 36 V,
Under the condition of VIN ≥ 3.5 V
0.01
0.02
%/V
∆VOUT
/∆Ta
Output Voltage
Temperature Coefficient
−40°C ≤ Ta ≤ 105°C
±60
ILIM
Output Current Limit
VIN = VSET +2.0 V
ISC
Short Current Limit
VIN = 5.0 V, VOUT = 0 V
75
IPD
CE Pull-down Current
VCE = 5.0 V
0.2
0.6
µA
VCE = 36 V
0.5
1.3
µA
tD1
Soft-start Time 1
VCEH
CE Input Voltage "H"
VCEL
CE Input Voltage "L"
TTSD
TTSR
RLOW
Thermal Shutdown
Temperature
Thermal Shutdown
Released Temperature
Low Output Nch Tr. ON
Resistance (R1517xxxxD)
−15
3
25
mV
−25
5
40
mV
Refer to Product-specific
Electrical Characteristics.
ppm
/°C
500
mA
mA
120
µs
2.2
V
1.0
V
Junction Temperature
160
°C
Junction Temperature
135
°C
VIN = 14.0 V, VCE = 0 V
3.2
kΩ
All test items listed under Electrical Characteristics are done under the pulse load condition (Tj ≈ Ta = 25°C) except for
Output Voltage Temperature Coefficient and Soft-start Time 1.
7
R1517x
NO. EA−304−201125
VIN = VFB ( = 2.5 V) + 1.0 V = 3.5 V, IOUT = 1 mA, CIN = 0.1 µF, COUT = 1.0 µF, unless otherwise noted.
The specifications surrounded by
are guaranteed by design engineering at -40°C ≤ Ta ≤ 105°C.
R1517x001C
Symbol
(Ta = 25°C)
Item
VIN
Input Voltage
VFB
Feedback Voltage
Conditions
Max.
Unit
3.5
36
V
Ta = 25°C
2.480
2.520
V
−40°C ≤ Ta ≤ 105°C
2.455
2.545
V
∆VOUT
/∆IOUT
Load Regulation
VIN = 4.5 V
1mA ≤ IOUT ≤ 250 mA
VIN = 4.5 V
1 mA ≤ IOUT ≤ 500 mA
VDIF
Dropout Voltage
IOUT = 500 mA
ISS
Supply Current
IOUT = 0 mA
Istandby
Standby Current
∆VOUT
/∆VIN
∆VOUT
/∆Ta
Min.
Typ.
−10
3
10
mV
−20
5
20
mV
1.0
V
18
36
µA
VCE = 0 V
0.1
2.0
µA
Line Regulation
3.5 V ≤ VIN ≤ 36 V
0.01
0.02
%/V
Output Voltage
Temperature Coefficient
−40°C ≤ Ta ≤ 105°C
±60
ILIM
Output Current Limit
VIN = 4.5 V
ISC
Short Current Limit
VIN = 5.0 V, VOUT = VFB = 0 V
75
IPD
CE Pull-down Current
VCE = 5.0 V
0.2
0.6
µA
VCE = 36 V
0.5
1.3
µA
tD1
Soft-start Time 1
VCEH
CE Input Voltage "H"
VCEL
CE Input Voltage "L"
TTSD
TTSR
Thermal Shutdown
Temperature
Thermal Shutdown
Released Temperature
ppm
/°C
500
mA
mA
120
µs
2.2
V
1.0
V
Junction Temperature
160
°C
Junction Temperature
135
°C
VOUT = VFB = 2.5 V (excluding short circuit current)
All test items listed under Electrical Characteristics are done under the pulse load condition (Tj ≈ Ta = 25°C) except for
Output Voltage Temperature Coefficient Soft-start Time 1.
8
R1517x
NO. EA−304−201125
VIN = VSET + 1.0 V, IOUT = 1 mA, CIN = COUT = 0.1 µF, unless otherwise noted.
The specifications surrounded by
are guaranteed by design engineering at -40°C ≤ Ta ≤ 105°C.
R1517xxxxE/F
Symbol
VIN
(Ta = 25°C)
Item
Conditions
Ta = 25°C
VOUT
Max.
Unit
3.5
36
V
×0.992
×1.008
V
VSET > 5.0 V ×0.99
×1.01
V
VSET ≤ 5.0 V
×1.018
V
×1.02
V
Input Voltage
Output Voltage
−40°C ≤ Ta ≤ 125°C
VSET ≤ 5.0 V
Min.
Typ.
×0.982
VSET > 5.0 V ×0.98
∆VOUT
/∆IOUT
Load Regulation
VIN = VSET +2.0 V
1 mA ≤ IOUT ≤ 250 mA
VIN = VSET +2.0 V
1 mA ≤ IOUT ≤ 500 mA
VDIF
Dropout Voltage
IOUT = 500 mA
ISS
Supply Current
IOUT = 0 mA
18
36
µA
Istandby
Standby Current
VCE = 0 V
0.1
2.0
µA
∆VOUT
/∆VIN
Line Regulation
VSET +0.5 V ≤ VIN ≤ 36 V,
Under the condition of VIN ≥ 3.5 V
0.01
0.02
%/V
∆VOUT
/∆Ta
Output Voltage
Temperature Coefficient
−40°C ≤ Ta ≤ 105°C
±60
ILIM
Output Current Limit
VIN = VSET +2.0 V
ISC
Short Current Limit
VIN = 5.0 V, VOUT = 0 V
75
IPD
CE Pull-down Current
VCE = 5.0 V
0.2
0.6
µA
VCE = 36 V
0.5
1.3
µA
2.5
3.5
µA
IDELAY
DELAY Current
DELAY = GND
tD1
Soft-start Time 1
DELAY = OPEN
tD2
Soft-start Time 2
DELAY = 0.001 µF
VCEH
CE Input Voltage "H"
VCEL
CE Input Voltage "L"
TTSD
TTSR
RLOW
Thermal Shutdown
Junction Temperature
Temperature
Thermal Shutdown
Junction Temperature
Released Temperature
Low Output Nch Tr. ON
VIN = 14.0 V, VCE = 0 V
Resistance (R1517xxx1F)
−15
3
25
mV
−25
5
40
mV
Refer to Product-specific
Electrical Characteristics.
ppm
/°C
500
1.5
mA
mA
26
210
290
µs
415
2.2
µs
V
1.0
V
160
°C
135
°C
3.2
kΩ
All test items listed under Electrical Characteristics are done under the pulse load condition (Tj ≈ Ta = 25°C) except for
Output Voltage Temperature Coefficient, Soft-start Time 1, and Soft-start Time 2.
9
R1517x
NO. EA−304−201125
Product-specific Electrical Characteristics
The specifications surrounded by
are guaranteed by design engineering at -40°C ≤ Ta ≤ 105°C.
R1517xxx1B/D/E/F
Product Name
(Ta = 25°C)
VOUT [V] (Ta = 25°C)
VOUT [V] (−40 ≤ Ta ≤ 105°C)
Min.
Typ.
Max.
Min.
Typ.
Max.
R1517x251x
2.480
2.500
2.520
2.455
2.500
2.545
R1517x331x
3.274
3.300
3.326
3.241
3.300
3.359
R1517x341x
3.373
3.400
3.427
3.339
3.400
3.461
R1517x501x
4.960
5.000
5.040
4.910
5.000
R1517x851x
8.415
8.500
8.585
8.330
8.500
RECOMMENDED OPERATING CONDITIONS
VDIF [V]
Typ.
Max.
1.00
0.45
0.77
5.090
0.35
0.62
8.670
0.30
0.50
(ELECTRICAL CHARACTERISTICS)
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.
10
R1517x
NO. EA−304−201125
TYPICAL APPLICATION
VDD
R1517xxxxB/D
C1
R1517xxxxB/D
VDD
Typical Application
VOUT
VOUT
R1517x001C
C1
R1
VFB
CE
VDD
CE Control
Typical Application
VOUT
VOUT
R1517Jxx1E/F
CE
CD
R1517xxxxE/F
C2
R2
GND
R1517x001C
C1
C2
GND
CE
CE Control
CE
Control
VOUT
VOUT
C2
GND
DELAY
Typical Application
External Components:
Symbol
Description
R1517xxxxB/D/E/F
C1 (CIN)
0.1µF (Ceramic)
C2 (COUT)
0.1µF (Ceramic)
R1517x001C
C1 (CIN)
0.1µF (Ceramic)
C2 (COUT)
1.0µF (Ceramic)
11
R1517x
NO. EA−304−201125
TECHNICAL NOTES
Phase Compensation
In LDO regulators, phase compensation is provided to secure stable operation even when the load current is
varied. For this purpose, use the capacitor C2 of 0.1 µF or more (R1517xxxxB/D/E/F) / 1.0 µF or more
(R1517x001C).
When using a tantalum type capacitor and the ESR (Equivalent Series Resistance) value is large, the output might
be unstable. Evaluate the circuit including consideration of frequency characteristics.
For the externally adjustable output voltage type (R1517x001C), use 10 kΩ or lower resistance R2.
PCB Layout
Ensure the VDD and GND lines are sufficiently robust. If their impedance is too high, noise pickup or unstable
operation may result. Connect 0.1 µF or more of the capacitor C1 between the VDD and GND, and as close as
possible to the pins.
In addition, connect the capacitor C2 between VOUT and GND, and as close as possible to the pins.
12
R1517x
NO. EA−304−201125
OPERATION DESCRIPTION
Thermal Shutdown Function
Thermal shutdown function is included in this device. If the junction temperature is more than or equal to 160°C
(Typ.), the operation of the regulator would stop. After that, when the junction temperature is less than or equal to
135°C (Typ.), the operation of the regulator would restart. Unless the cause of rising temperature is removed, the
regulator repeats on and off, and output waveform would be like consecutive pulses.
Adjustable Output Voltage Setting (R1517x001C)
The output voltage of R1517x001C can be adjusted by using the external divider resistors (R1, R2). By using the
following equation, the output voltage (VOUT) can be determined. The voltage which is fixed inside the IC is
described as VFB.
VOUT = VFB x ((R1 + R2) / R2)
Recommended Range: 2.5 V ≤ VOUT ≤ 20.0 V
VFB = 2.5 V
VOUT
R1
I1
VFB
RIC
GND
VOUT
IIC
R2
I2
VFB
Output Voltage Adjustment Using External Divider Resistors (R1, R2)
RIC of the R1517x001C is approximately Typ. 1.35 MΩ (Ta=25°C, guaranteed by design engineering). For better
accuracy, setting R1