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SP6120HV 数据表(PDF) 4 Page - Sipex Corporation |
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SP6120HV 数据表(HTML) 4 Page - Sipex Corporation |
4 / 22 page 4 Date: 5/25/04 SP6120HV Low Voltage, Synchronous Buck Controller © Copyright 2004 Sipex Corporation PIN DESCRIPTION NAME FUNCTION PIN NUMBER 1 N/C No Connection 2 ENABLE TTL compatible input with internal 4uA pullup. Floating or Venable> 1.5V will enable the part, Venable < 0.65V disables part. 3 ISP Current Sense Positive Input: Rail to Rail Input for Over-Current Detection, 43mV threshold with 10µs (typ) response time. 4 ISN Current Sense Negative Input: Rail to Rail input for Over-Current Detection. 5VFB Feedback Voltage Pin: Inverting input of the error amplifier and serves as the output voltage feedback point for the buck converter. The output voltage is sensed and can be adjusted through an external resistor divider. 6 COMP Error Amplifier Compensation Pin: A lead lag network is typically connected to this pin to compensate the feedback loop. This pin is clamped by the SS voltage and is limited to 2.8V maximum. 7SS Soft Start Programming Pin: This pin sources 50µA on start-up. A 0.01µF to 1µF capacitor on this pin is typically enough capacitance to soft start a power supply. In addition, hiccup mode timing is controlled by this pin through the 5µA discharge current. The SS voltage is clamped to 2.7V maximum. 8ROSC Frequency Programming Pin: A resistor to ground is used to program frequency. Typical values - 18,700Ω, 300kHz; 10,200Ω, 500kHz. 9 PROG Programming Pin: PROG = GND; MODE = NFET/CONTINOUS PROG = 68kΩ to GND; MODE = NFET/DISCONTINOUS PROG = VCC; MODE = PFET/CONTINOUS PROG = 68kΩ to VCC; MODE = PFET/DISCONTINOUS 10 VCC I.C. Supply Pin: ESD structures also hooked to this pin. Properly bypass this pin to PGND with a low ESL/ESR ceramic capacitor. 11 GL Synchronous FET Driver: 1nF/20ns typical drive capability. 12 PGND Power Ground Pin: Used for Power Stage. Connect Directly to GND at I.C. pins for optimal performance. 13 GND Ground Pin: Main ground pin for I.C. 14 SWN Switch Node Reference: High side MOSFET driver reference. Can also be tied to GND for low voltage applications. 15 GH HIgh Side MOSFET Driver: Can be NFET or PFET depending on Program Mode. 1nF/20ns typical drive capability. Maximum voltage rating is referenced to SWN. 16 BST High Side Driver Supply Pin. When VBST is less than VBST OK Threshold, GL is forced to turn on for at least 300ns. This is intended for enough time to charge the BST capacitor. |
类似零件编号 - SP6120HV |
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类似说明 - SP6120HV |
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