Special Contents for Automotive Applications
The reason RICOH power management IC has been chosen for more than 20 years
Special Contents for IoT Devices
Ultra-low supply current / Low noise / Low electromotive force / Battery monitoring
Special Contents for Industrial Applications
Long term supply / Flexible quantity purchase / High quality and reliability
The RP509 is a low supply current PWM/VFM step-down DCDC converter with synchronous rectifier featuring 0.5A / 1A output current.
Output voltage controlling method is selectable between a forced PWM control type and a PWM/VFM auto-switching control type, and can be set by the MODE pin.
Internally, a single converter consists of a reference voltage unit, an error amplifier, a switching control circuit, a mode control circuit, a soft-start circuit, an under-voltage lockout (UVLO) circuit, a thermal shutdown circuit, and switching transistors.
Furthermore, RP509 is current limit circuit and thermal shutdown circuit. Lx current limit value (Typ.) is selectable between 1.6 A and 1.0 A.
The RP509Z is available in WLCSP−6−P6 which achieves high-density mounting on boards. A high frequency of 6 MHz enables to use capacitor of 0402- / 1005-size (inch / mm) and inductor of 0603- /1608-size (inch / mm) as external parts help to save space for devices.
The RP509N is available in SOT-23-6.
|Input Voltage Range (Maximum Rating)||2.3 V to 5.5 V (6.5V)|
|Standby Current||Typ. 0 µA|
|Output Voltage Range||Fixed Output Voltage Type||0.6 V to 3.3 V - Settable in 0.1 V Step|
|Adjustable Output Voltage Type||0.6 V to 5.5 V|
|Output Voltage Accuracy||Fixed Output Voltage Type||±1.5% (VSET*1 ≥ 1.2V), ±18 mV (VSET < 1.2V)|
|Feedback Voltage Accuracy||Adjustable Output Voltage Type||±9 mV (VFB = 0.6V)|
|Output Voltage/Feedback Voltage Temperature Coefficient||±100 ppm/°C|
|Selectable Oscillator Frequency||Typ. 6.0 MHz|
|Oscillator Maximum Duty||Min. 100%|
|Built-in Driver ON Resistance (VIN = 3.6 V)||Typ. Pch. 0.175 Ω, Nch. 0.155 Ω (RP509Z)
Typ. Pch. 0.195 Ω, Nch. 0.175 Ω (RP509N)
|UVLO Detector Threshold||Typ. 2.0 V|
|Soft-start Time||Typ. 0.15 ms|
|Inductor Current Limit Circuit||Typ. 1.6 A / 1.0 A - Selectable Current Limit|
|Packages||WLCSP−6−P6 (1.28 mm x 0.88 mm), SOT-23-6|
*) VSET = Set Output Voltage
Fixed Output Voltage Type
Adjustable Output Voltage Type
Efficiency vs. Output Current VOUT=1.8V
VMODE = "L" PWM/VFM Auto Switching
Efficiency vs. Output Current VOUT=3.3V Fixed
VMODE = "L" PWM/VFM Auto Switching
*) The tab is substrate level (GND).
PRODUCT LONGEVITY PROGRAM
RP509 series operate PRODUCT LONGEVITY PROGRAM.
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.
The set output voltage, the output voltage type, the auto-discharge function, and the Lx current limit for the ICs are user-selectable options.
|Product Name||Package||Quantity per Reel|
|$||Output Voltage Type||Auto-discharge||VSET|
|A||Fixed||No||0.6 V to 3.3 V|
|C||Adjustable||No||0.6 V to 5.5 V|
* 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.
|Package *1||Marking||Reliability *2|
*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.