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TPS2151IPWPG4 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS2151IPWPG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 33 page TPS2140, TPS2141 TPS2150, TPS2151 SLVS399A − JANUARY 2002 − REVISED MAY 2006 ADJUSTABLE LDO AND SWITCH WITH DUAL CURRENT LIMIT FOR USB HIGHPOWER PERIPHERAL POWER MANAGEMENT 1 www.ti.com FEATURES D Complete Power Management Solution for USB High-Power Peripherals D 250 mA Low-Dropout Regulator (LDO) With Enable and 325 mA (Typ) Current Limit D LDO Supports 2.7 V to 5.5 V VIN and 0.9 V to 3.3 V Adjustable VOUT D 40 mΩ (Typ) High-Side MOSFET With Dual Current Limit D Undervoltage Lockout and Power Good for LDO and Switch D CMOS- and TTL-Compatible Enable Inputs D 85 µA (Typ) Supply Current D 5 µA (Typ) Standby Supply Current D Available in 14-Pin HTSSOP (PowerPAD) D −40°C to +85°C Ambient Temperature Range D Alternative to TPS2148/58 3.3-V LDO With 3.3-V Switch and 5-V Switch APPLICATIONS D High-Power USB Peripherals − ADSL Modems − Digital Still and PC Cameras − Zip Drives − Speakers D DSP Sequencing DESCRIPTION The TPS2140/41/50/51 is a USB 1.0 and 2.0 Specification-compatible IC containing a dual-current- limiting power switch and an adjustable low dropout regulator (LDO). Both the switch and LDO limit inrush current by controlling the turnon slew rate. The unique dual-current-limiting feature of the switch allows USB peripherals to utilize high-value capacitance at the output of the switch, while keeping the inrush current low. During turnon, the switch limits the current delivered to the capacitive load to less than 100 mA. When the output voltage from the switch reaches about 93% of the input voltage, the switch power good output goes high, and the switch current limit increases to 800mA (minimum), at which point higher current loads can be turned on. The higher current limit provides short circuit protection while allowing the peripheral to draw maximum current from the USB bus. The switch and LDO function independently, providing flexibility in DSP applications requiring separate core and I/O voltages. For example, in a DSP application operating from a 3.3-V rail, the LDO can supply the DSP core voltage down to 0.9 V, while the switch powers the 3.3-V (typical) DSP I/O supply. If supply sequencing is required, the LDO power good output can be used to enable the switch. AVAILABLE OPTIONS TARGET PACKAGE PACKAGED DEVICES TA DESCRIPTION TARGET APPLICATION PACKAGE AND PIN COUNT ACTIVE LOW (SWITCH) ACTIVE HIGH (SWITCH) −40 °C to 85°C Adjustable LDO and 3.3 V switch with dual current limit DSP HTSSOP-14 TPS2140IPWP TPS2150IPWP −40 °C to 85°C Adjustable LDO and 5 V switch with dual current limit USB HTSSOP-14 TPS2141IPWP TPS2151IPWP NOTE: All options available taped and reeled. Add an R suffix (e.g., TPS2140IPWPR) PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 2000−2006, Texas Instruments Incorporated Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments. USB is a trademark of Universal Serial Bus Association. All other trademarks are the property of their respective owners. |
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