crackerboy
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Low Quiscent Current, High Efficiency when Low Loaded DC-DC Converter Suggestion?
I am using a MCU and a GSM module in my project. MCU consumes 250mA (max), GSM module consumes 400mA(average) and while transmitting RF signals consume 2A (peak).
And also MCU consumes 1mA, GSM module consumes 1,5mA while IDLE mode.
I have searched for ultra low quiescent current DC-DC converters, find some possible ICs that is useful for me.
I want to use a 800mA DC-DC converter IC for GSM module. But i want to support it via capacitor to achieve 2A current supply.
Question: Can i use a High Value capacitor to sink 2A instantaneously from 800mA DC-DC converter ? Which capacity is suitable?
Actually i'm using LM2576 that has 10-14mA Quiescent current, it is not suitable for my project.
Basicly i need:
1- Efficiency>60% while 1-5mA Current Consumption,:!:
2- Low Quiescent DC-DC converter IC to supply GSM module (Peak 2A),:roll:
3- 4.2 and 3.3V outputs for GSM Module and MCU.:sad:
Here is my solutions but not yet decided to use:
1-**broken link removed** -> 1.5A 13.2V, 0.15mA Quiscent, -> Very Low Quiscent Current but relatively complex circuit.
2-**broken link removed** -> 2.5A,600mA 13.2V, 0.6mA+0.07mA Quiscent, -> Very Low Quiscent Current but relatively complex circuit.
2- **broken link removed** MAX5087B -> 45V 400mA Qis-0.07-5.3mA -> 400mA is not enough for peak 2A current requirement
3- TPS5420 -> 2A(3Apeak ), 3-4.4mA Quiscent ->
I am using a MCU and a GSM module in my project. MCU consumes 250mA (max), GSM module consumes 400mA(average) and while transmitting RF signals consume 2A (peak).
And also MCU consumes 1mA, GSM module consumes 1,5mA while IDLE mode.
I have searched for ultra low quiescent current DC-DC converters, find some possible ICs that is useful for me.
I want to use a 800mA DC-DC converter IC for GSM module. But i want to support it via capacitor to achieve 2A current supply.
Question: Can i use a High Value capacitor to sink 2A instantaneously from 800mA DC-DC converter ? Which capacity is suitable?
Actually i'm using LM2576 that has 10-14mA Quiescent current, it is not suitable for my project.
Basicly i need:
1- Efficiency>60% while 1-5mA Current Consumption,:!:
2- Low Quiescent DC-DC converter IC to supply GSM module (Peak 2A),:roll:
3- 4.2 and 3.3V outputs for GSM Module and MCU.:sad:
Here is my solutions but not yet decided to use:
1-**broken link removed** -> 1.5A 13.2V, 0.15mA Quiscent, -> Very Low Quiscent Current but relatively complex circuit.
2-**broken link removed** -> 2.5A,600mA 13.2V, 0.6mA+0.07mA Quiscent, -> Very Low Quiscent Current but relatively complex circuit.
2- **broken link removed** MAX5087B -> 45V 400mA Qis-0.07-5.3mA -> 400mA is not enough for peak 2A current requirement
3- TPS5420 -> 2A(3Apeak ), 3-4.4mA Quiscent ->