SG1526B Microsemi Corporation, SG1526B Datasheet
SG1526B
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SG1526B Summary of contents
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... DESCRIPTION The SG1526B is a high-performance pulse width modulator for switching power supplies which offers improved functional and electrical characteris- tics over the industry-standard SG1526. A direct pin-for-pin replacement for the earlier device with all its features, it incorporates the following enhance- ments: a bandgap reference circuit for improved regulation and drift ...
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... Reference Load Current ........................................... Oscillator Frequency Range .............................. Oscillator Timing Resistor .................................. Note 2. Range over which the device is functional. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1526B with - - SG3526B with case temperatures equal to the ambient temperature.) ...
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... 1000pF 1000pF L SHUTDOWN = 0.4V Note . Note Note 9. These parameters, although guaranteed over the recom- mended operating conditions, are not tested in production. 3 SG1526B/SG2526B/SG3526B SG3526B SG1526B/2526B Min. Typ. Max. Min. Typ. Max 0.5 1.0 0 1.0 500 500 2.5 3.0 3.5 2.5 3.0 ...
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... CHARACTERISTIC CURVES FIGURE 1. REFERENCE VOLTAGE VS. SUPPLY VOLTAGE FIGURE 4. REFERENCE RIPPLE REJECTION FIGURE 7. SOFTSTART TIME CONSTANT VS 4/90 Rev 1.1 2/94 Copyright 1994 SG1526B/SG2526B/SG3526B FIGURE 2. REFERENCE TEMPERATURE STABILITY FIGURE 5. UNDER VOLTAGE LOCKOUT FIGURE 8. CURRENT LIMIT TRANSFER FUNCTION 4 FIGURE 3. REFERENCE SHORT CIRCUIT FIGURE 6. ERROR AMPLIFIER OPEN LOOP GAIN VS ...
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... CHARACTERISTIC CURVES (continued) FIGURE 10. STANDBY CURRENT VS. SUPPLY VOLTAGE FIGURE 13. SUPPLY CURRENT VS. OUTPUT FREQUENCY FIGURE 16. OSCILLATOR FREQUENCY TEMPERATURE STABILITY 4/90 Rev 1.1 2/94 Copyright 1994 SG1526B/SG2526B/SG3526B FIGURE 11. OUTPUT DRIVER DEADTIME VS. C VALUE T FIGURE 14. SUPPLY CURRENT VS. OUTPUT FREQUENCY FIGURE 17. OUTPUT DRIVER SATURATION VOLTAGE 5 FIGURE 12. OUTPUT DRIVER DEADTIME VS. R ...
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... T APPLICATION INFORMATION VOLTAGE REFERENCE The reference regulator of the SG1526B is a “band-gap” type; that is, the precision +5 volt output is derived from the very predictable base-emitter voltage of an NPN transistor. Since this is a sub-surface phenomenon, the resulting output exhibits excellent stability compared to earlier surface-breakdown zener designs. ...
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... APPLICATION INFORMATION DIGITAL CONTROL PORTS The three digital control ports of the SG1526B are bi- directional. Each pin can drive TTL and 5 volt CMOS logic directly fan-out of 10 low-power Schottky gates. Each pin can also be directly driven by open-collector TTL, open-drain CMOS, and open-collector voltage comparators, fan-in is equivalent to 1 low-power Schottky gate. Each port is normally HIGH ...
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... APPLICATION INFORMATION OUTPUT DRIVERS The totem-pole output drivers of the SG1526B are designed to source and sink 100mA continuously and 200mA peak. Loads can be driven either from the output pins 13 and 16, FIGURE 26. PUSH-PULL CONFIGURATION SG1526B LAB TEST FIXTURE 4/90 Rev 1.1 2/94 Copyright 1994 (continued) or from the +V voltage at these outputs as a function of load current are found in Figure 17 ...
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... N - PACKAGE SG3526BN 18-PIN WIDE BODY SG2526BDW PLASTIC S.O.I.C. SG3526BDW DW - PACKAGE SG1526BL/883B 20-PIN CERAMIC LEADLESS CHIP CARRIER SG1526BL L- PACKAGE Note 1. Contact factory for JAN and DESC product availability. 2. All parts are viewed from the top. 4/90 Rev 1.1 2/94 Copyright 1994 SG1526B/SG2526B/SG3526B (See Notes Below) Ambient ...