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RP108 Series
Low Voltage 3A LDO Regulator with Reverse Current Protection
The RP108 Series are CMOS-based LDO regulators featuring 3A output with low on-resistance. The CMOS process provides both large output current and low supply current. The dropout voltage is significantly lower than bipolar regulators. The RP108 handles low voltage with an input voltage from 1.6V and an output voltage from 0.8V. Accordingly, the device supports highly integrated, low voltage-driven LSI as a rear stage of the DC/DC converter.
RP108J081x can set adjustable output voltage with external resistors. The CE pin can switch the regulator into standby mode. In addition to a fold-back protection circuit built into conventional LDO regulators, RP108 has a thermal shutdown circuit, a reverse current protection circuit and a constant slope circuit. The constant slope circuit is a soft start function to prevent inrush current and malfunction of devices.
Specs & Datasheets
| Consumer | Industrial | Automotive | |
|---|---|---|---|
| Input Voltage Range | 1.6 V to 5.25 V (6.0 V) | ||
| Operating Temperature Range | -40°C to 85°C (125°C) | -40°C to 105°C (125°C) | -40°C to 105°C (150°C) |
| Supply Current | Typ. 350 µA | ||
| Standby Current | Typ. 2 µA | ||
| Output Voltage Range | Internally Fixed Ver.: 0.8 V to 4.2 V (0.1 V step) Externally Adjustable Ver.: 0.8 V to 4.2 V |
Internally Fixed Ver.: 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V Externally Adjustable Ver.: 0.8 V to 4.2 V |
Internally Fixed Ver.: 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V Externally Adjustable Ver.: 0.8 V to 4.2 V |
| Output Voltage Accuracy | ±1.0% (Ta = 25°C) (±15 mV accuracy at VSET ≤ 1.5 V, Ta = 25°C) |
||
| Output Voltage Temperature Coefficient | Typ. ±100 ppm/°C | ||
| Dropout Voltage | Typ. 0.51 V (VOUT = 2.5 V) | ||
| Line Regulation | Typ. 0.1%/V | ||
| Output Current | Min. 3 A | ||
| Ripple Rejection | Typ. 65 dB (f = 1 kHz, VOUT = 2.5 V) | ||
| Package | TO-252-5-P2 | ||
Protections / Functions
| TSD | Reverse | Current Limit | ISC | Inrush | Constant Slope | ECO mode | Auto Discharge | External Driver |
|---|---|---|---|---|---|---|---|---|
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Technical Documents
RP108J081x Typical Application: Externally adjustable output voltage type
Output voltage should be set up to 4.2V
VOUT = 0.8×((R1+R2) / R2)
RP108Jxx1x Typical Application: Internally fixed output voltage type
The VOUT pin should be connected to the VFB pin
RP108J251x Dropout Voltage vs. Output Current
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| RP108Jxx1x-T1-FE |
|
TO-252-5-P2 | RP108J | RP108J-FE |
| RP108Jxx1x-T1-YE |
|
TO-252-5-P2 | RP108J | RP108J-YE |
| RP108Jxx1x-T1-AE |
|
TO-252-5-P2 | RP108J | RP108J-AE |
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Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.
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Functional Description
| TSD | Thermal Shutdown Function |
|---|---|
| Reverse Current Protection | Reverse Current Protection |
| Current Limit | Overcurrent Protection |
| ISC | Short Current Protection |
| Inrush Current Limit | Inrush Current Protection |
| Constant Slope | Constant Slope Function |
| ECO mode | ECO Function |
| Auto Discharge | Auto Discharge Function |
| External Driver | External Output Driver Transistor |