PM6644TR データシートの表示（PDF） - STMicroelectronics

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PM6644TR

350 mA adjustable step-down regulator

STMicroelectronics 

Simplified application schematic

PM6644

Table 6. Electrical characteristics (continued)

Symbol

Parameter

Test condition

Min.

Typ. Max. Unit

FB

Overvoltage trip threshold

Referred to FB nominal

regulation point, BYP= 3.47 V

+14

FB

Undervoltage threshold

Referred to FB nominal

regulation point, BYP= 3.47 V

62

Inputs and outputs

+20

%

73

%

FB

FB logic level

FB logic level to be in fixed

mode

VCC-0.8

V

EN

EN level

All circuitry OFF

All circuitry ON

1.3

V

2.4

V

1. In the range Tj = 0 °C-70 °C limits are guaranteed by design and statistical analysis, not production tested. Production test

at Tj=25 °C.

1.6

Typical operating characteristics

FB = VCC, RTON = 1 MΩ, VIN = 12 V, EN = VIN, BYP connected to the switching regulator

output, no load unless specified. Measurements performed on the evaluation kit

(PM6644_DFN).

Figure 4.























Efficiency vs. load

Figure 5.

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Switching frequency vs. load

3WITCHINGFREQUENCY24/.-

3WITCHINGFREQUENCY24/.-







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!-V

10/35

Doc ID 023203 Rev 1

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