XC9145
XC9145 Ultra-Low Power Step-Up DC/DC Converter
With a low quiescent current of only 400nA the XC9145 maintains high efficiency even at low output currents and the PWM/PFM automatic switchover control circuit significantly improves the power conversion efficiency and keeps the output ripple low.
The XC9145 is great for applications where the device will need to be on or in stand-by mode for a significant time as it reduces the power consumption of the battery. This contributes to extending the battery life and reducing the size of battery required. Ideal for application designs such as remote controls, wearable, security systems and IoT.
KEY FEATURES:
- Ultra-low power consumption
- 400nA Quiescent Current
- 400nA Quiescent Current
- Long battery life
- High efficiency even at low output loads
- High efficiency even at low output loads
- Space saving designs
- WLP-6-05 only 1.08 x 1.28 mm (typ.)
- WLP-6-05 only 1.08 x 1.28 mm (typ.)
Typical Application Circuit
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| SERIES | |||
| VIN Range |
0.65 V ~ 5.5 V |
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| Operation Start Voltage | 1.6 V | ||
| VOUT Range | 3.0 V ~ 5.5 V (in 0.1V steps) | ||
| Output Current | 430mA @ VOUT 5.0V, VBAT 3.3V 300mA @ VOUT 3.3V, VBAT 1.8V |
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| Quiescent Current: | 400nA | ||
| Efficiency | 89.9% @ VIN=2.4V, VOUT=3.3V, IOUT=10μA 93.2% @ VIN=2.4V, VOUT=3.3V, IOUT=100mA |
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| PFM Switching Current | 200mA (typ.) | ||
| Control Method | PWM/PFM Auto | ||
| Op. Amb. Temp. |
-40oC ~ 105oC |
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| Small PCB Area | 20.3 mm2 (incl. external components) |
High Efficiency
The internal PWM/PFM automatic switchover control circuit, combined with the ultra-low quiescent current of 400nA (Typ.) significantly improves the power conversion efficiency at light loads. As shown in the graph below, even at low output currents like 0.01μA the efficiency remains above 85% for a range of different input voltages.
Maximise Battery Life
Through use of the Load Disconnect Mode, the XC9145 delivers a dramatic improvement to the power loss under sleep mode compared to previous products, decreasing power consumption by 74 % compared to the conventional PWM/PFM XC9142 and 53% compared to the Low Power XC9140.
So great are the power saving gains in sleep mode that it doubles the life of the battery compared to the XC9142. This gives design engineers the option to opt for smaller batteries in designs where space is at a premium.
The graphs above show the loss comparison with other products, under the following conditions:
Vin=1.8 V -> Vout = 3.3 V, Active: Iout = 10 mA @ 10 ms ⇔ Sleep : Iout = 5 uA @ 10 s
Fast Transient Response
This Step-Up DC/DC Converter is ideal for applications that require to be switching on and off repeatedly such as smart meters. As shown in the charts below the voltage recovers quickly with minimum ripple (noise) maintaining a stable VOUT.
Ultra-Compact Design
Available in SOT25 and two smaller packages – the USP-6C and the WLP-6-05. At 1.8 mm x 2.0 mm x 0.6 mm the USP-6C is very small and suitable for many applications taking up less area of the PCB compared to other solutions available in the market.
However, if further space saving is needed the WLP-6-05 is tiny at almost half the size, measuring only 1.08 mm x 1.28 mm x 0.4 mm.
USP-6C
WLP-6-05
