R1517x-Y Series
500 mA 36V Input Low Supply Current LDO for Industrial Application
NO. EY—304—200422
OUTLINE
R1517x is a CMOS-based LDO 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.
R1517x supports the internal fixed output voltage type of R1517xxx1B/D/E/F and the adjustable output voltage
setting type, which is controlled by external resistances, of R1517x001C. As for the soft-start time, R1517x is fixed
internal in R1517xxx1B/D/E/F and is set to 120 µs (Typ). And the soft-start time in R1517xxx1E/F is adjustable by
external capacitors. R1517x supports the auto-discharge function at standby in R1517xxx1D/F.
R1517x is available in two packages for ultra-high wattage: HSOP-6J and TO-252-5-P2.
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 Rating) ················ 3.5 V to 36.0 V (50.0V)
Operating Temperature Range ····························
−40°C
to 125°C
Supply Current ················································· Typ. 18 µA
Standby Current ··············································· Typ. 0.1 µA
Dropout Voltage ··············································· Typ. 0.35 V (I
OUT
= 500 mA, V
OUT
= 5.0 V)
Output Voltage Accuracy ···································· ±0.8% (V
OUT
≤
5.0 V)
Temperature-Drift Coefficient of Output Voltage ······· Typ. ±60 ppm/°C (−40°C
≤
Ta
≤
125°C)
Line Regulation ················································ Typ. 0.01%/V
Packages ······················································· HSOP-6J, TO-252-5-P2
Output Voltage Range ······································· 2.5 V/3.3 V/3.4 V/5.0 V/8.5 V
* Contact Ricoh sales representatives for other voltages.
R1517x001C: Adjustable from 2.5 V to 12.0 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
R1517xxx1E/F: Adjustable Time Setting with External
Capacitors.
Usable Ceramic Capacitors ································ 0.1 µF or more
R1517x001C: 1.0 µF or more
1
R1517x
NO. EY—304—200422
APPLICATIONS
Industrial equipment such as FAs and smart meters.
Equipment used under high-temperature conditions such as surveillance camera and vending machine.
Equipment accompanied by self-heating such as motor and lighting.
BLOCK DIAGRAMS
R1517xxx1B
R1517x001C
V
DD
Internal VR
Soft
Start
Vref
V
OUT
V
DD
Internal VR
Soft
Start
Vref
V
OUT
V
FB
Current Limit
Thermal Shutdown
Current Limit
Thermal Shutdown
CE
GND
CE
GND
R1517xxx1D
R1517xxx1E
V
OUT
V
DD
V
DD
Internal VR
Soft
Start
Vref
Internal VR
Soft
Start
V
OUT
DELAY
Current Limit
Thermal Shutdown
Vref
GND
CE
Current Limit
Thermal Shutdown
GND
CE
R1517xxx1F
V
DD
Internal VR
Soft
Start
V
OUT
DELAY
Vref
Current Limit
Thermal Shutdown
CE
GND
2
R1517x
NO. EY—304—200422
SELECTION GUIDE
The output voltage, version, and package type for this device can be selected at the user’s request.
Package
HSOP-6J
R1517S001C-E2-YE
R1517Jxx1∗-T1-YE
TO-252-5-P2
R1517J001C-T1-YE
xx: Specify the set output voltage (V
SET
)
2.5 V (25) / 3.3 V (33) / 3.4 V (34) / 5.0 V (50) / 8.5 V (85)
Note: Contact Ricoh sales representatives for other voltages.
Adjustable output voltage setting type is fixed to (00)
Note: For R1517S001C-E2-YE and R1517J001C-T1-YE (No auto-discharge function)
∗ :
Specify the version with desired functions
B: No auto-discharge function
D: Auto-discharge function
E: No auto-discharge function / Adjustable soft-start time setting
F: Auto-discharge function / Adjustable soft-start time setting
3,000 pcs
Yes
Yes
Quantity per Reel
1,000 pcs
Pb Free
Yes
Halogen Free
Yes
Product Name
R1517Sxx1∗-E2-YE
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. EY—304—200422
PIN DESCRIPTION
6
5
4
*1
1
2
3
1
2
3
4
5
HSOP-6J
HSOP-6J
Pin No.
1
2
Symbol
V
DD
GND
NC
3
V
FB
DELAY
4
5
6
TO-252-5-P2
Pin No.
1
CE
GND
V
OUT
Input Pin
Ground Pin
No Connection
Feedback Pin
Soft-start Time Pin
Chip Enable Pin, Active-high
Ground Pin
Output Pin
TO-252-5-P2
Description
R1517Sxx1B/D
R1517S001C
R1517Sxx1E/F
Symbol
V
DD
NC
Input Pin
No Connection
Feedback Pin
Description
R1517Jxx1B/D
R1517J001C
R1517Jxx1E/F
2
V
FB
DELAY
Adjustable Soft-start Time Pin
Ground Pin
Chip Enable Pin, Active-high
Output Pin
3
4
5
*1
The
GND
CE
V
OUT
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. EY—304—200422
PIN EQUIVALENT CIRCUIT DIAGRAMS
Driver
CE
V
OUT
V
OUT
Pin
CE Pin
Internal VR
V
FB
DELAY
DELAY Pin (R1517xxx1E/F)
V
FB
Pin (R1517x001C)
5
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