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SM627 Datasheet(PDF) 3 Page - Micro Electronics

Part No. SM627
Description  SWITCHING REGULATOR POWER OUTPUT STAGES
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Maker  MICRO-ELECTRONICS [Micro Electronics]
Homepage  http://www.microelectr.com.hk
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SM627 Datasheet(HTML) 3 Page - Micro Electronics

   
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SM625/SM626/SM627
4/90 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright
© 1994
11861 Western Avenue
∞ Garden Grove, CA 92841
3
(714) 898-8121
∞ FAX: (714) 893-2570
Current Delay Time
Current Rise Time
Voltage Rise Time
Voltage Storage Time
Voltage Fall Time
Current Fall Time
Efficiency (Note 5)
Test Conditions
Parameter
Units
ELECTRICAL SPECIFICATIONS (continued)
Note 4. In switching an inductive load, the current will lead the voltage on turn-on and lag the voltage on turn-off (see Figure 2). Therefore, Voltage
Delay Time (t
DV) ≅ tdi + tri and Current Storage Time (tsi) ≅ tsv + tfv .
Note 5. The efficiency is a measure of internal power losses and is equal to Output Power divided by Input Power. The switching speed circuit of Figure
1, in which the efficiency measured, is represenative of typical operating conditions for the SM600 series switching regulators.
Dynamic Characteristics (See Figures 1 & 2) (Notes 4 & 5)
AC TEST CIRCUIT AND SWITCHING TIME WAVEFORMS (Note 6)
FIGURE 1 - SM625/626/627 SWITCHING SPEED CIRCUIT
FIGURE 2 - SM625/626/627 SWITCHING WAVEFORMS
SM625
SM626
SM627
ns
ns
ns
ns
ns
ns
%
60
150
60
175
300
35
65
40
700
70
175
85
SG625/626/627
Min.
Typ. Max.
FIGURE 4 - NEGATIVE OUTPUT DOWN/UP (BUCK-BOOST) CONVERTER
FIGURE 3 - STEP DOWN (BUCK) CONVERTER
APPLICATION CIRCUITS
SM62X
SM62X


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