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LM5010AMH/NOPB Datasheet(PDF) 3 Page - Texas Instruments |
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LM5010AMH/NOPB Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 36 page  ExposedPad 1 NC 14 NC 2 SW 13 VIN 3 BST 12 VCC 4 I SEN 11 R ON /SD 5 S GND 10 SS 6 RTN 9 FB 7 NC 8 NC ExposedPad 1 SW 10 VIN 2 BST 9 VCC 3 I SEN 8 R ON /SD 4 S GND 7 SS 5 RTN 6 FB 3 LM5010A, LM5010A-Q1 www.ti.com SNVS376F – OCTOBER 2005 – REVISED MAY 2016 Product Folder Links: LM5010A LM5010A-Q1 Submit Documentation Feedback Copyright © 2005–2016, Texas Instruments Incorporated 5 Pin Configuration and Functions DPR Package 10-Pin WSON Top View PWP Package 14-Pin HTSSOP Top View Pin Functions PIN I/O DESCRIPTION NAME WSON HTSSOP BST 2 3 I Boost pin for bootstrap capacitor: Connect a capacitor from SW to the BST pin. The capacitor is charged from VCC through an internal diode during the buck switch OFF- time. EP — — — Exposed pad FB 6 9 I Voltage feedback input from the regulated output: Input to both the regulation and overvoltage comparators. The FB pin regulation level is 2.5 V. ISEN 3 4 I Current sense: During the buck switch OFF-time, the inductor current flows through the internal sense resistor, and out of the ISEN pin to the free-wheeling diode. The current limit comparator keeps the buck switch off if the ISEN current exceeds 1.25 A (typical). NC — 1, 7, 8, 14 — No connection. Can be connected to ground plane to improve heat dissipation. RON/SD 8 11 I ON-time control and shutdown: An external resistor from VIN to this pin sets the buck switch ON-time. Grounding this pin shuts down the regulator. RTN 5 6 — Circuit ground: Ground return for all internal circuitry other than the current sense resistor. SGND 4 5 — Sense ground: Recirculating current flows into this pin to the current sense resistor. SS 7 10 I Soft start: An internal 11.5-µA current source charges the SS pin capacitor to 2.5 V to softstart the reference input of the regulation comparator. SW 1 2 O Switching node: Internally connected to the buck switch source. Connect to the inductor, free-wheeling diode, and bootstrap capacitor. VCC 9 12 I Output of the bias regulator: The voltage at VCC is nominally equal to VIN for VIN < 8.9 V, and regulated at 7 V for VIN > 8.9 V. Connect a 0.47-µF, or larger capacitor from VCC to ground, as close as possible to the pins. An external voltage can be applied to this pin to reduce internal dissipation if VIN is greater than 8.9 V. MOSFET body diodes clamp VCC to VIN if VCC > VIN. VIN 10 13 I Input supply: Nominal input range is 6 V to 75 V. Input bypass capacitors should be located as close as possible to the VIN pin and RTN pin. |
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