Datasheet

Simplified application schematic PM6644
10/35 Doc ID 023203 Rev 1
1.6 Typical operating characteristics
FB = VCC, R
TON
= 1 MΩ, V
IN
= 12 V, EN = VIN, BYP connected to the switching regulator
output, no load unless specified. Measurements performed on the evaluation kit
(PM6644_DFN).
FB Overvoltage trip threshold
Referred to FB nominal
regulation point, BYP= 3.47 V
+14 +20 %
FB Undervoltage threshold
Referred to FB nominal
regulation point, BYP= 3.47 V
62 73 %
Inputs and outputs
FB FB logic level
FB logic level to be in fixed
mode
VCC-0.8 V
EN EN level
All circuitry OFF 1.3 V
All circuitry ON 2.4 V
1. In the range T
j
= 0 °C-70 °C limits are guaranteed by design and statistical analysis, not production tested. Production test
at T
j
=25 °C.
Table 6. Electrical characteristics (continued)
Symbol Parameter Test condition Min. Typ. Max. Unit
Figure 4. Efficiency vs. load Figure 5. Switching frequency vs. load
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