Datel 20A manual Dynamic Load Response and Switching Frequency, Performance Specifications

USQ Series 2 0 A , S I N G L E O U T P U T D C / D C C O N V E R T E R S

Dynamic Load Response and Switching Frequency

DATEL has performed extensive evaluations, under assorted capacitive-load conditions, of the dynamic-load capabilities (i.e., the transient or step response) of USQ Series DC/DC Converters. In particular, we have evalu- ated devices using the output capacitive-load conditions we use for our routine production testing (10µF tantalums in parallel with 1µF ceramics), as well as the load conditions many of our competitors use (220µF tantalums in parallel with 1µF ceramics) when specifying the dynamic performance of their devices.

To avoid the added cost of constantly changing test fixtures, we have veri- fied, during our device characterization/verification testing, that 100% testing under the former conditions (the 100µF 1µF load), which we guarantee, correlates extremely well with the latter conditions, for which we and most of our competitors simply list typicals.

If you have any questions about our test methods or would like us to perform additional testing under your specific load conditions, please contact our Applications Engineering Group.

Load Conditions ➀	Performance Specifications	1.2VOUT	1.5VOUT	1.8VOUT	2.5VOUT	3.3VOUT	5VOUT	12 to 24VOUT
	Load Step = 50 to 75% of IOUT Max.:
	Peak Deviation, typ.	115mV	110mV	125mV	100mV	170mV	125mV	100mV
COUT = 10µF 1µF	Settling Time to ±1% of Final Value, max. ➁	200µs	200µs	225µs	200µs	100µs	100µs	100µs
	Load Step = 75 to 50% of IOUT Max.:
10µF 1µF
	Peak Deviation, typ.	115mV	110mV	125mV	100mV	100mV	125mV	100mV
	Settling Time to ±1% of Final Value, max. ➁	140µs	200µs	225µs	200µs	100µs	100µs	100µs
	Load Step = 50 to 75% of IOUT Max.:
	Peak Deviation, typ.	120mV	TBD	105mV	90mV	105mV	TBD	85mV
COUT = 220µF 1µF	Settling Time to ±1% of Final Value, typ. ➁	115µs	TBD	170µs	65µs	65µs	TBD	40µs
	Load Step = 75 to 50% of IOUT Max.:
	Peak Deviation, typ.	120mV	TBD	90mV	90mV	105mV	TBD	50mV
	Settling Time to ±1% of Final Value, typ. ➁	150µs	TBD	150µs	70µs	65µs	TBD	25µs
	Switching Frequency (min./typ./max. kHz)	120/150/180	120/150/180	170/185/200	230/255/280	132/147/162	220/240/260	190/210/230

➀The listed pair of parallel output capacitors consists of a tantalum in parallel with a multi-layer ceramic.

➁ ∆IO/∆t = 1A/1µs, VIN = 48V, TC = 25°C.

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