RP604 Buck/Boost DC/DC Converter - Nisshinbo

DigiKey电子元器件新产品信息 > RP604 300 mA Buck/Boost DC/DC Converter with Ultra-Low Quiescent Current

            RP604 300 mA Buck/Boost DC/DC Converter with Ultra-Low Quiescent Current
                    Nisshinbo Micro Devices’ RP604 buck/boost converter features a minimum supply current and high efficiency at low load
    

Nisshinbo Micro Devices’ RP604 buck/boost DC/DC converter is designed for wearable devices, Internet of Things (IoT) applications, and wireless communications modules requiring low current consumption levels to extend battery life. The product requires only three external components to reduce valuable circuit board space and allows users to select from two packages.

The RP604 is particularly well suited when a supply voltage is required somewhere between the voltage level of a fully charged and fully discharged battery. At a specific moment, the DC/DC converter automatically switches from buck to boost mode to maintain the output voltage setting. The RP604 is designed for applications that are mainly in sleep mode and wake up periodically to perform a measurement, transmit data, and then return to sleep mode. For these types of applications, the current consumption in sleep mode should remain as low as possible. The RP604 has an impressive low quiescent current and consumes only 300 nA, prolonging battery life or making it possible for the designer to select a smaller-sized battery for the application.

The RP604 can provide up to 300 mA in buck mode, while in boost mode, the output current is less and related to the input voltage level.

Multiple protection circuits are integrated, including an undervoltage lockout (UVLO) circuit, which disables the DC/DC converter if the input voltage drops below a minimum threshold. A soft-start circuit controls the output voltage to ramp up smoothly and prevents any output overshoot and undershoot during the start-up period. The LX current limit circuit prevents the peak current through the inductor from exceeding a specific maximum current threshold. An output overvoltage protection (OVP) turns off both the P-channel and N-channel MOSFETs and thermal protection, shutting down the IC in case the junction temperature increases above +140°C.

The RP604 has an optional auto-discharge function, rapidly discharging the output capacitor once the CE pin disables the chip. Available package sizes include the small-sized WLCSP-20-P2 and DFN(PLP)2730-12.

Features

Input voltage range: 1.8 V to 5.5 V
Output voltage range (in 0.1 V step): 1.6 V to 5.2 V
Output voltage accuracy: ±1.5%
Output current (buck mode): 300 mA
Quiescent current (device not switching): Typ. 300 nA
Standby current: 0.01 µA
PMOS on-resistance (V_IN = 3.6 V, RP604Z): 0.12 Ω

NMOS on-resistance (V_IN = 3.6 V, RP604Z): 0.12 Ω
Protection circuits: UVLO, OVP, soft-start, LX peak current, and thermal
Peak efficiency: 92%
Auto-discharge function: Optional
Package RP604Z: WLCSP-20-P2 (1.71 mm x 2.315 mm x 0.4 mm)
Package RP604K: DFN(PLP)2730-12 (2.70 mm x 3.00 mm x 0.6 mm)

Applications

Wearable appliances:
- Smartwatches
- Smartbands
- Healthcare
Low-power devices for CPUs, memory, sensor devices, and energy harvesting

Li-ion/coin battery-used equipment
Low-power wireless communication equipment:
- Bluetooth^® Low Energy (BLE)
- Zigbee^®
- WiSunm
- ANT™

RP604 300 mA Buck/Boost DC/DC Converter with Ultra-Low Quiescent Current

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