The XC9519 series is a 2 channel (step-up and inverting) DC/DC converter IC. One DC/DC converter is a step-up DC/DC and the other is an inverting DC/DC converter. The step-up converter compares a built-in reference voltage 1.0V to the FBP voltage (accuracy ±1.5%) and a positive output voltage can be set freely with the external components up to 18V. The inverting DC/DC converter compares a difference between a reference voltage and the FBN voltage (accuracy ±1.5%) to the GND, then a negative output voltage can be set until -15V with the external components. With a 1.2MHz frequency, the size of the external components can be reduced. As for operation mode, the device can be selected to use PWM control or automatic PWM/PFM switching control by the MODE pin. In the automatic PWM/PFM switching control mode, control switches from PWM to PFM during light loads. The series is highly efficient from light loads through to large output currents. In the PWM control mode, noise is easily reduced since the frequency is fixed. The control mode can be selected for each application. The soft start and current control functions are internally optimized. During stand-by, all circuits in the IC are shutdown to reduce current consumption to as low as 1.0μA or less. The device includes a gate control pin for the P-channel MOSFET which is used for a load disconnection at the stand-by mode. The GAINP and GAINN pin are used for adjusting output voltage and current.
The XC9519 Series is a dual‑channel DC/DC converter IC that provides a step‑up output and an inverting output. The step‑up channel compares a 1.0 V reference to the FBP pin, while the inverting channel compares the reference to the FBN pin, allowing positive voltages up to 18 V and negative voltages down to –15 V.
The device operates at a fixed 1.2 MHz frequency and supports PWM or automatic PWM/PFM control via the MODE pin. It includes built‑in soft‑start, over‑current limit, short‑circuit protection, UVLO, thermal shutdown, and over‑voltage protection, and is supplied in a QFN‑24 package.
| Input Voltage | 2.7 V ~ 5.5 V |
|---|---|
| Output Current | 500 mA @ VIN=3.7 V, VOUTP=5.0 V, VOUTN=-5.0 V |
| Positive Output Voltage Range | 4.0 V ~ 18.0 V (±1.5 % @25 °C) |
| Negative Output Voltage Range | -15.0 V ~ -4.0 V (±1.5 % @25 °C) |
| Oscillation Frequency | 1.2 MHz |
| Soft‑Start Time (Step‑up) | 2.5 ms (typ.) |
| Soft‑Start Time (Inverting) | 2.2 ms (typ.) |
| Protection Circuits | Over‑Current Limit, Short Protection, UVLO, Thermal Shutdown, Over‑Voltage Protection |
| Package | QFN‑24 |
The device operates with an input voltage from 2.7 V to 5.5 V.
The converter uses a fixed oscillation frequency of 1.2 MHz.
It includes over‑current limit, short‑circuit protection, UVLO, thermal shutdown, and over‑voltage protection.
The IC is supplied in a QFN‑24 package.