MIC4576-5.0WU Micrel Inc, MIC4576-5.0WU Datasheet
MIC4576-5.0WU
Specifications of MIC4576-5.0WU
MIC4576-5.0WU
Available stocks
Related parts for MIC4576-5.0WU
MIC4576-5.0WU Summary of contents
Page 1
... General Description The MIC4576 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200kHz MIC4576 duplicates the pinout and function of the 52kHz LM2576. The higher switching frequency may allow 2:1 reduction in output filter inductor size. The MIC4576 is available in 3.3V, and 5V fixed output ver- sions ...
Page 2
... Ordering Information Standard RoHS Compliant Part Number Part Number* MIC4576-3.3BT MIC4576-3.3WT MIC4576-5.0BT MIC4576-5.0WT MIC4576BT MIC4576WT MIC4576-3.3BU MIC4576-3.3WU MIC4576-5.0BU MIC4576-5.0WU MIC4576BU MIC4576WU * RoHS compliant with "high-melting solder" exemption. Pin Configuration Pin Description Pin Number Pin Name GND TAB 4 5 SHDN MIC4576 ...
Page 3
... Feedback Voltage (V ) [Adjustable] ......................... +3.8V FB Storage Temperature ................................ –65°C to +150°C Electrical Characteristics V = 12V 500mA 25°C, bold values indicate –40°C ≤ LOAD J Parameter Condition MIC4576 [Adjustable] Feedback Voltage Feedback Voltage 8V ≤ V Efficiency I LOAD Maximum Duty Cycle (On Output Leakage Current V IN output = 0V output = – ...
Page 4
... Parameter Condition MIC4576 / -3.3 / -5.0 Oscillator Frequency Saturation Voltage I OUT Current Limit peak current, t Standby Quiescent Current V SHDN SHDN Input Logic Level V OUT V OUT SHDN Input Current V SHDN V SHDN General Note: Devices are ESD protected, however, handling precautions are recommended. Note 1: ...
Page 5
... Block Diagram with External Components Fixed Step-Down Regulator +36V max Internal Regulator Thermal Current Shutdown Limit 200kHz Oscillator Driver Com- parator 3A Switch 1.23V Bandgap Error Amp. [Adjustable] GND Block Diagram with External Components Adjustable Step-Down Regulator OUT D1 C OUT OUT D1 C OUT MIC4576 ...
Page 6
... Functional Description The MIC4576 is a variable duty cycle switch-mode regulator with an internal power switch. Refer to the block diagrams. Supply Voltage The MIC4576 operates from a +4V to +36V 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 ...
Page 7
... UPL1C102MPH, ESR = 0.047 Ω D1, D2 Motorola MBR360 L1, L2 Coiltronics PL52C-33-1000, DCR = 0.036 R1, R2 KRL SP-1-A1-0R100J U3 National LM358 Figure 6. Parallel Switching Regulators SHDN SW 33µH MIC4576-5.0BT 8V to 36V GND D1 470µF 3 MBR360 63V C1 Nichicon UPL1J471MRH, ESR = 0.039Ω C2 Nichicon UPL1C102MPH, ESR = 0.047Ω ...
Page 8
... Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Pr MIC4576 0.150 D ±0.005 (3.81 D ±0.13) 0.400 ± ...