MIC4575 Micrel Semiconductor, MIC4575 Datasheet
MIC4575
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MIC4575 Summary of contents
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... MIC4575 General Description The MIC4575 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200kHz MIC4575 duplicates the pinout and function of the 52kHz LM2575. The higher switching frequency may allow 2:1 reduction in output filter inductor size. ...
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... MIC4575 Ordering Information Part Number MIC4575-3.3BT MIC4575-5.0BT MIC4575BT MIC4575-3.3BU MIC4575-5.0BU MIC4575BU Pin Configuration Pin Description Pin Number Pin Name GND TAB SHDN April 1998• Voltage Temperature Range 3.3V – +85 C 5.0V – +85 C Adjustable – ...
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... SHDN Input Current SHDN = 5V (regulator off) SHDN = 0V (regulator on) General Note: Devices are ESD protected, however, handling precautions are recommended. Note 1: The MIC4575 is not guaranteed to survive a short circuit to ground for input voltage above 24V. Operating Ratings Supply Voltage (V Junction Temperature ............................................. +150 C Package Thermal Resistance ...
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... MIC4575 Block Diagrams Shutdown Enable SHDN MIC4575-x.x Shutdown Enable SHDN MIC4575 April 1998• +24V max Internal Regulator Thermal Current Shutdown Limit 200kHz Oscillator Driver Com- parator 1A Switch 1.23V Bandgap Error Amp GND Block Diagram with External Components Fixed Step-Down Regulator +24V max ...
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... MIC4575 Functional Description The MIC4575 is a variable duty cycle switch-mode regulator with an internal power switch. Refer to the block diagrams. Supply Voltage The MIC4575 operates from a +4V to +24V unregulated input. Highest efficiency operation is from a supply voltage around +15V. Enable/Shutdown The shutdown ( ) input is TTL compatible. Ground the SHDN input if unused ...
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... SHDN FB C1 GND 3 UPL1V151MPH ESR = 0.13 UPL1C681MPH ESR = 0.065 1N5819 1N5819 DCR = 0.045 Through Hole 4-111 SHDN SW 68µH MIC4575-3.3BU GND D1 3 MBRS130LT3 C1 Sanyo 35CV150GX, ESR = 0.17 C2 Sanyo 16CV470GX, ESR = 0.17 D1 Motorola MBRS130LT3 L1 Coilcraft DO3316P-683, DCR = 0. HM77-11003, DCR = 0.233 ...
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... UPL1V151MPH, ESR = 0.12 C2 Nichicon UPL1C681MPH, ESR = 0.065 D1 Motorola 1N5819 L1 Coiltronics PL52A-15-500, DCR = 0.054 Figure 11 –5V/0.3A Buck-Boost Converter Through Hole T1 L1 68µ 1µH MIC4575BU GND C4 D1 220µF 3 MBRS130LT3 10V TPSE226M035R0300, ESR = 0.3 TPSE227M010R0100, ESR = 0.1 TPSE227M010R0100, ESR = 0.1 MBRS130LT3 ...
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... LM4041CIZ-1 68µ GND 1N5819 249 1% Figure 15. Low Output-Voltage Regulator (1V 68µH 0.25 R2 MIC4575BT 200 GND D1 U2 1N5819 3 LM358 1 Q1 VN2222LL C3 C4 1000pF 0.01µ 1.00k 1% Figure 16. 1A Battery Charger (6–8 cells) 4-113 U2 LM4041CIZ-1.2 ...
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... Figure 17. 0.1A–1A Variable-Current Battery Charger 5 SHDN MIC4575- 24V GND 3 C1 150µF 35V U1 Micrel MIC4575BT U2 National LM358 C1 Nichicon UPL1V151MPH, ESR = 0.12 C2 Nichicon UPL1C331MPH, ESR = 0.12 D1 Motorola 1N5819 D2 Motorola 1N5819 D3 Motorola 1N4148 L1 Coiltronics PL52B-68-500, DCR = 0.095 R1 KRL SP-1-A1-0R100J Q1 Siliconix VN2222LL ...
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... SW D1 1N5819 C3 0.1µ GND 3 R3 113k 0.01µ U2B 5 1/2 LM358 4 MIC4575BT LM358 V IN min UPL1V151MPH, ESR = 0.12 UPL1C331MPH, ESR = 0.12 1N5819 1N5819 I = OUT 1N5244 HM77-11003, DCR = 0.233 SP-1/2-A1-0R100J Figure 21. 1A Battery Charger 4-115 10 ft Wire V OUT 0.5 5V/ SENSE R2 3 ...
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... SW D1 1N5819 0.01µ U2B 7 1/2LM358 20k 10K V MIC4575BT IN min LM358 UPL1V151MPH, ESR = 0.12 V UPL1C102MPH, ESR = 0.047 OUT max 1N5819 HM77-11003, DCR = 0.233 and 1N4148 R1 L1 0.1 D1 68µH 1N5819 100 1% U2A 1/2LM358 C4 3 ...
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... Figure 24. Lithium-Ion Battery Charger with End-of-Charge Flag U1 5 SHDN SW MIC4575BU 18V GND C1 3 22µF 35V U1 Micrel MIC4575BU U2 Micrel MIC29150-5.0BU C1 AVX TPSE226M035R0300, ESR = 0.3 C2 AVX TPSE227M010R0100, ESR = 0.1 C3 AVX TPSE106M010R0200, ESR = 0.2 C4 Sprague 293D226X0010C2W D1 Motorola MBRS130LT3 D2 Motorola MBRS130LT3 L1 Bi HM77-11003, DCR = 0.233 L2 Coilcraft D016087C-102, DCR = 0.05 Figure 25. Low Output-Noise Regulator (< ...