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About RICOH Electronic Devices
RP515 Series
Low Power Consumption 300mA Buck DC/DC Converter with Battery Monitor
- RoHS
Product Specifications
The RP515 is a buck DC/DC converter with a Battery Monitor (BM) featuring ultra-low current and low-voltage resistance. The battery monitor divides the input voltage (VIN) into 1/3 or 1/4 to a buffer output and inputs a signal directly into the MCU’s built-in low voltage AD converter without external circuits. It is suitable for use in wearable and IoT devices that require miniaturization and long-lifetime of battery.
- Ultra-low consumption current (IQ: 0.3 µA) with the VFM control for DC/DC (switching frequency: 1 MHz max.)
- High efficiency under light load conditions
- Reducing components and space by combining DC/DC and BM into a single chip
- Suitable for coin batteries and USB ports due to its wide input voltage range from 1.8 V to 5.5 V
FEATURES
| DC/DC Section | Input Voltage Range (Maximum Rating) | 1.8 V to 5.5 V (6.5 V) |
|---|---|---|
| Operating Quiescent Current (IQ) | Typ. 0.3 µA | |
| Standby Current | Typ. 0.01 µA | |
| Output Voltage | 1.0 V to 4.0 V | |
| Output Voltage Accuracy | ±1.5% | |
| Output Current | 300 mA | |
| BM Section | Output Voltage | VIN /3 (RP515xxx3x) VIN /4 (RP515xxx4x) |
| Output Voltage Accuracy | ±30 mV | |
| Supply Current | Typ. 0.1 µA | |
| Package | WLCSP-9-P2, DFN(PLP)2527-10 | |
APPLICATION INFORMATION
TYPICAL CHARACTERISTICS
Efficiency vs. Output Current (VOUT = 1.8 V)
PIN DESCRIPTION
WLCSP-9-P2
1.45 mm × 1.48 mm| A1 | AVIN |
| B1 | PVIN |
| C1 | LX |
| A2 | CE1 |
| B2 | CE2 |
| C2 | PGND |
| A3 | BM |
| B3 | VOUT |
| C3 | AGND |
DFN(PLP)2527-10
2.7 mm × 2.5 mm| 1 | VOUT |
| 2 | AGND |
| 3 | PGND |
| 4 | LX |
| 5 | LX |
| 6 | PVIN |
| 7 | AVIN |
| 8 | CE1 |
| 9 | CE2 |
| 10 | BM |
*) 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.
RP515 Series for Consumer
APPLICATIONS
- Coin cell-used equipment and Li-ion battery-used equipment
- Wearable devices such as SmartWatch, SmartBand and Health monitoring
- Low Power RF Modules such as Bluetooth® LE, Zigbee, WiSun and ANT
- Low Power CPU, Memory, Sensor device and Energy Harvester
SELECTION GUIDE
The set output voltage for DC/DC, the division ratio of BM output voltage, the auto-discharge function for DC/DC and the packages are user-selectable options.
| Product Name | Package | Quantity per Reel | |
|---|---|---|---|
| RP515Zxx#$-TR-F |  |
WLCSP-9-P2 | 5,000 |
| RP515Kxx#$-TR | |
DFN(PLP)2527-10 | 5,000 |
- xx … Specify the set output voltage for DC/DC (VSET) within the range from 1.0 V (10) to 4.0 V (40).
- # … Select the division ratio of BM output voltage.
3: VIN /3
4: VIN /4 - $ … Select the auto-discharge option for DC/DC.
C: DC/DC auto-discharge is not included
D: DC/DC auto-discharge is included
* Auto-discharge function quickly lowers the output voltage to 0 V, 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.
DOCUMENT/CONTACT
| Package *1 | Marking | Reliability *2 |
|---|---|---|
| WLCSP-9-P2 | RP515Z | RP515Z |
| DFN(PLP)2527-10 | RP515K | RP515K |
*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.
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