HKR 08J101

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DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

RP108J Series
Low Input Voltage 3A LDO Regulator
NO.EA-203-150817
1
OUTLINE
The RP108J is a CMOS-based voltage regulator IC featuring 3A output with low ON-resistance.
The RP108J consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a fold-back
protection circuit, and a thermal shutdown circuit. The RP108J features both low supply current and high output
current, and the dropout voltage is much smaller than bi-polar's. The minimum input voltage is as low as 1.6V
and the output voltage can be set from 0.8V, therefore it can be connected with the DC/DC converter as the latter
power supply for high density LSI that is operated by low output voltage.
The output voltage of RP108J081x is externally adjustable by using external divide resistors. The CE pin of the
RP108J can switch the regulator to standby mode. In addition to a fold-back protection circuit, which is already
built in the conventional regulators, The RP108J contains a thermal shutdown circuit, a constant slope circuit as
a soft-start function and a reverse current protection circuit. Ceramic capacitors can be used.
FEATURES
Output Current ............................................................. Min. 3A
Supply Current ............................................................. Typ. 350µA
Standby Current ........................................................... Typ. 2µA
Input Voltage Range .................................................... 1.6V to 5.25V
Output Voltage Range .................................................. Fixed Output Voltage Type: 0.8V to 4.2V (0.1V steps)
* R
efer to MARK INFORMATIONS for other voltages.
Adjustable Output Voltage Type: 0.8V to 4.2V
Output Voltage Accuracy .............................................. ±1.0% (±15mV accuracy, When V
SET
1.5V)
Output Voltage Temperature-drift Coefficient ........... Typ. ±100ppm/°C
Ripple Rejection ........................................................... Typ. 65dB (f = 1kHz, V
SET
= 2.8V)
Dropout Voltage ........................................................... Typ. 0.51V (V
SET
=2.8V)
Line Regulation ............................................................ Typ. 0.1%/V
Package ....................................................................... TO-252-5-P2
Built-in Fold-back Protection Circuit ............................. Typ. 220mA
Built-in Thermal Shutdown Circuit ................................ Stops at 165°C
Built-in Constant Slope Circuit
Built-in Reverse Current Protection Circuit
Ceramic capacitors are recommended to be used with this IC ···· 10µF or more
APPLICATIONS
Power source for battery-powered equipments.
Power source for portable communication equipments such as cameras and VCRs.
Power source for electrical home appliances.
RP108J
NO.EA-203-150817
2
BLOCK DIAGRAMS
RP108Jxx1B/E RP108Jxx1D/F
V
DD
GND
V
OUT
CE
Current Limit
Thermal S
hutdown
V
FB
Reverse Detecter
V
DD
GND
V
OUT
CE
Vref
Current Limit
Thermal Shutdown
V
FB
Reverse Detecter
SELECTION GUIDE
The output voltage, auto discharge function, and the soft-start time for the ICs can be selected at the user’s
request.
Product Name
Package
Quantity per Reel
Pb Free
Halogen Free
RP108Jxx1(y) -T1-FE
TO-252-5-P2 3,000 pcs Yes Yes
xx: The set output voltage (V
SET
) can be designated in the range of 0.8V(08) to 4.2V(42) in 0.1V steps.
y: If the output voltage includes the 3rd digit, indicate the digit of 0.01V.
(1.25V, 1.85V, 2.85V)
Ex. If the output voltage is 1.25V, RP108J1215-T1-FE.
If the output voltage is 1.85V, RP108J1815-T1-FE.
If the output voltage is 2.85V, RP108J2815-T1-FE.
: Designation of auto-discharge function at off state and the soft-start time
(B) No auto-discharge function, soft start time typ. 180 μs
(D) Auto-discharge function, soft start time typ. 180 μs
(E) No auto-discharge function, soft start time typ. 570 μs
(F) Auto-discharge function, soft start time typ. 570 μs
.
Auto-discharge function quickly lowers the output voltage to 0V, when the chip enable signal is switched from the active
mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor.
Refer to CONSTANT SLOPE CIRCUIT for detailed information on the difference of soft-start time and its effect.
RP108J
NO.EA-203-150817
3
PIN DESCRIPTIONS
TO-252-5-P2
1
2
3
4
5
TO-252-5-P2
Pin No.
Symbol
Description
1
CE
Chip Enable Pin ("H" Active)
2
V
DD
Input Pin
3
GND
Ground Pin
4
V
OUT
Output Pin
5
V
FB
Feedback 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 floating.
The V
OUT
pin should be connected to the V
FB
pin when using RP108J as an internal fixed output voltage type.
In case of using RP108J as an external adjustable type, please refer to "Adjustable Output Voltage Type
Settings".
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