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Part Number: TPS61021A
In my design, i want to use a Lithium-Manganese battery(voltage range is form 1.5v-3v) as a power source for a dcdc boost power ic, and i will use the dcdc boost power ic to driver a gsm RF module, due to the work mode of gsm system, the RF module need 3.8v input, and the peak current of this module is about 2A(the peak current continued time is abour 5us), so , i searched in TI's website and i find the tps61021a has the similar performance, but i am afraid whether tps61021a could afford the peak current of the gsm RF module?i want to know which power ic i can choice?
Boost DC/DC Solution
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In reply to Helen chen:
Sorry,i made a mistake, i measued the peak current, it is about 2.4A, and it lasts about 580us, the output volage drop of the TPS61021A is about 0.7V, so, is this ok?
In reply to Matthew.huang:
Hi Helen: I add two 220uF tantalum output capacitors and the output voltage drop goes well. But the spec suggest that the output capacitor should be smaller than 200uF(you can see it in the picture below). So, could i add two 220uF tantalum capacitors? Thanks.
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