General Description
The XCM519 series is a multi combination module IC which comprises of a 600mA driver transistor built-in synchronous step?down DC/DC converter and a low voltage input LDO regulator. The device is housed in small USP-12B01 package which is ideally suited for space conscious applications. Battery operated portable products require high efficiency so that a dual DC/DC converter is often used. The XCM519 can replace this dual DC/DC to eliminate one inductor and reduce output noise. The DC/DC converter and the LDO regulator blocks are isolated in the package so that noise interference from the DC/DC to the LDO regulator is minimal.
A low output voltage and low On-resistance LDO regulator is added in series to the DC/DC output so that one another low output voltage is created with a high efficiency and low noise. With comparison to the dual DC/DC solution, one inductor can be eliminated which results in parts reduction and board space saving.With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 1.4V or lower.
Features
- Input Voltage Range :2.7V &tilde 6.0V
- Output Voltage Range :0.8V &tilde 4.0V
- High Efficiency :92% (TYP.)
- Output Current:600mA (MAX.)
- Oscillation Frequency:1.2MHz,3.0MHz (±15%)
- Maximum Duty Cycle:100%
- Protection Circuit:Current Limiter Circuit Built-In(Constant Current & Latching)
- Soft-start:Soft-Start Circuit Built-In
- Control :PWM(XCM519A), PWM/PFM Auto(XCM519B)
- Regulator Block
- Maximum Output Current:400mA (500mA Limit : TYP.)
- Dropout Voltage :35mV@IOUT=100mA (TYP)(VBIAS - VROUT(E)=2.4V)
- Bias Voltage Range :2.5V &tilde 6.0V (VBIAS - VROUT(E)=0.9V)
- Input Voltage Range :1.0V &tilde 3.0V (VIN2 &le VBIAS)
- Output Voltage Range :0.7V&tilde1.8V(0.05V increments)
- High Output Accuracy:±20mV
- Supply Current:IBIAS=25µ A , IIN2=1.0 µ A (TYP.)
- Stand-by Current:IBIAS=0.01 µ A , IIN2=0.01µ A (TYP.)
- UVLO :VBIAS=2.0V , VIN2=0.4V (TYP.)
- Thermal Shut Down Detect: 150° C , Release: 125° C (TYP.)
- Soft-start Time:240 µ s@VROUT=1.2V(TYP.)
- CL Discharge :High Speed Auto-Discharge
- Low ESR Capacitor :Ceramic Capacitor Compatible
- Operating Temperature Range:-40 ° C &tilde +85° C
- Package :USP-12B01
Applications
- Mobile phones, Smart phones
- Bluetooth equipment
- Portable communications modems
- Portable games consoles
Typical Application Circuit
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