30V Operation Low Quiescent Current Step-down DC/DC Controller IC

The XC9252 series is a 30V operation step-down DC/DC controller IC. The external P-ch driver transistor is used to achieve a stable operation under low input voltage. Low ESR capacitors such as ceramic capacitors can be used for the load capacitor (CL).

A 0.8V reference voltage source is incorporated, and the output voltage can be set freely from 1.0V using external resistors (RFB1, RFB2).

300kHz to 600kHz can be selected for the switching frequency by connecting an external resistor to the ROSC pin. The generation of unneeded noise can be reduced by this synchronization with an external CLK within ±25% of the internal clock using the MODE/SYNC pin. In automatic PWM/PFM control, the IC operates by PFM control when the load is light to achieve high efficiency over the full load range from light to heavy.

The soft start time can be set as desired by adding an external capacitance to the SS pin.

With the built-in UVLO function, the driver transistor is forced OFF when input voltage becomes 2.5V or lower.

Internal protection circuits include over current protection, short-circuit protection, and thermal shutdown circuits to enable safe use.

Feature

Input Voltage Range 3.0V～30V (AbsoluteMax Rating 36V)
FB Voltage 0.8V(±2%)
Quiescent Current 30μA(@300kHz)
Oscillation Frequency 280kHz～550kHz (External Resistor)
External Clocking Synchronous ±25% of the internal clock
Protection Circuits Over current limit
Integral latch method(XC9252C)
Automatic return(XC9252A/B)
Thermal shutdown
Capacitor Low ESR Capacitor
Operating Ambient Temperature -40℃～+105℃
Environmentally Friendly EU RoHS compliant, Pb free

Typical Application Circuit

Technical Document

Packages

Package Number of Pins Pcs/Reel Package Size(mm)
TSSOP-16 16 3,000 6.4 x 5.1 x 1.25
USP-10B 10 3,000 2.6 x 2.9 x 0.6

XC9252 Series Part Numbers

Part number Sample Type Output Voltage Oscillation Frequency Packages EDA Online Store
XC9252A08AVR-G Without Latch protection, with chip enable 0.8V Adjastable TSSOP-16(Type A,C)
XC9252B08ADR-G Without Latch protection, chip enable 0.8V Adjastable USP-10B(Type B)
XC9252C08AVR-G Without Latch protection, with chip enable 0.8V Adjastable TSSOP-16(Type A,C)

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