XC9148 Series
Load Disconnection Function, 1.2A Step-up DC/DC Converters
XC9148 series are synchronous step-up DC/DC converters with a 0.2Ω(TYP.) N-channel driver transistor and a 0.2Ω(TYP.) synchronous P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 1.2A by reducing ON resistance of the built-in transistors.
The series are able to start operation under the condition which has 0.9V input voltage to generate 3.3V output voltage with a 22Ω(TBD) load resistor, suitable for mobile equipment using only one Alkaline battery or one Nickel metal hydride battery.
The output voltage can be set from 1.8V to 5.5V (±2.0%) in steps of 0.1V.With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected for suiting to your particular application.
During the devices enter stand-by mode, A/D/G/J types prevent the application malfunction by CL Discharge Function which can quickly discharge the electric charge at the output capacitor (CL). B/E/H/K types is able to drive RTC etc. by Bypass Switch Function to maintain continuity between the input and output. C/F/I/L types is able to connect in parallel with other power supplies by Load Disconnection Function which breaks continuity between the input and output. G/H/I/J/K/L types is capable to reduce leaking potassium hydroxide by stopping IC operation while battery voltage is declining. The release voltage of UVLO is 1.6V (±3.0% accuracy).
Typical Application Circuit
Features
| Input Voltage Range | 0.65V ~ 6.0V (Operation start voltage : 0.9V) |
|---|---|
| Fixed Output Voltage | 1.8V ~ 5.5V (A,B,C type) 2.2V ~ 5.5V (except A,B,C type) |
| Oscillation Frequency | 1.2MHz 3.0MHz |
| Output Current | 750mA @VOUT=5.0V, VBAT=3.3V 500mA @VOUT=3.3V, VBAT=1.8V |
| Control Mode Selection | Auto PWM/PFM |
| Load Transient Response | 100mV@VOUT=3.3V, VBAT=1.8V, fosc=3.0MHz IOUT=1mA→200mA (tr=5μs) |
| Protection Function | Thermal shutdown Current Limit Integral Latch Method (D/E/F/J/K/L Types) Short Circuit Protection (D/E/F/J/K/L Types) UVLO (G/H/M/J/K/L Types) |
| Functions | Soft-start Load Disconnection (A/C/D/F/G/I/J/L Type) CL Auto Discharge (A/D/G/J Type) Bypass Switch(E/H/K Type) |
| Output Capacitor | Ceramic Capacitor |
| Operating Ambient Temperature | -40℃ ～ +105℃ |
| Environmentally Friendly | EU RoHS Compliant, Pb Free |
Packages
| Package | SOT-89-5 | Number of Pins | 5 |
|---|---|---|---|
| Pcs/Reel | 1,000 | Package Size(mm) | 4.5 x 4.6 x 1.6 |
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| Package | USP-6C | Number of Pins | 6 |
|---|---|---|---|
| Pcs/Reel | 3,000 | Package Size(mm) | 1.8 x 2.0 x 0.6 |
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