TPSM53602: switching frequency in PFM mode ?

vinay kattela

Part Number: TPSM53602

While I referred datasheetTPSM53602RDAR, as the switching frequency is dependent on the input voltage, output voltage and the load current.

Most probably we might be at 1.4Mhz switching freq in PWM mode for the cases only if we hit the min load current per figure 7-14, 7-15.

TPSM53602, 3.8-V to 36-V Input, 1-V to 7-V Output, 2-A Power Module datasheet (Rev. B) (ti.com)

what might be the switching frequency, where the load currents are lower, which means the part would be in PFM mode

over 2 years ago

0 Andrew Kutzler over 2 years ago

TI__Mastermind 25890 points

Hi Vinay,

We may be able to use Webench to simulate the switching frequency the device has at your customer's operating condition. Could you list your customer's operating conditions

(VIN/VOUT/IOUT/TEMP/etc.)?

Thanks,

Andrew

0 vinay kattela over 2 years ago

Prodigy 70 points

Hello Andrew,

hope following table gives hint of required info.

operating ambient temperature at the max 40 degree C

Ref Des	Supply	Part Number	Switching frequency	Min load current to hit 1.4Mhz
U42	+12V to +5V	TPSM53602RDAR	Unknown; PFM mode	>0.35A PWM mode, if <0.35A PFM mode
U43	+12V to +1V	TPSM53602RDAR	Unknown; PFM mode	>1A PWM mode, if <1A PFM mode
U44	+12V to +3.3V	TPSM53602RDAR	1.4MHz (typ); PWM mode	>0.65A PWM mode, if <0.65A PFM mode
U45	+12V to +1.8V	TPSM53602RDAR	1.4MHz (typ); PWM mode	>0.7A PWM mode, if <0.7 PFM mode