TPS62273DRVR

TPS62270, TPS62272 TPS62273 www.ti.com ........................................................................................................................................... SLVS799C – NOVEMBER 2007 – REVISED JANUARY 2009 2.25 MHz 400-mA Step Down Converter With Selectable VOUT FEATURES 1 • High Efficiency Step Down Converter • Output Current up to 400 mA • VIN Range From 2V to 6V for Li-Ion Batteries With Extended Voltage Range • 2.25 MHz Fixed Frequency Operation • Pin-Selectable Fixed Output Voltage • Power Save Mode for Highest Efficiency • Automatic transition between PFM and PWM Mode • Voltage Positioning in PFM Mode • Typical 15-µA Quiescent Current • 100% Duty Cycle for Lowest Dropout • Available in 2×2×0,8 mm SON Package • Allows 4.5V. The input capacitor can be increased without any limit for better input voltage filtering. Take care when using only small ceramic input capacitors. When a ceramic capacitor is used at the input and the power is being supplied through long wires, such as from a wall adapter, a load step at the output or VIN step on the input can induce ringing at the VIN pin. This ringing can couple to the output and be mistaken as loop instability or could even damage the part by exceeding the maximum ratings. Table 3. List of Capacitors 16 CAPACITANCE TYPE SIZE mm3 SUPPLIER 4.7 µF GRM188R60J475K 0603: 1.6 × 0.8 × 0.8 mm3 Murata 10 µF GRM188R60J106M69D 0603: 1.6 × 0.8 × 0.8 mm3 Murata Submit Documentation Feedback Copyright © 2007–2009, Texas Instruments Incorporated Product Folder Link(s): TPS62270 TPS62272 TPS62273 TPS62270, TPS62272 TPS62273 www.ti.com ........................................................................................................................................... SLVS799C – NOVEMBER 2007 – REVISED JANUARY 2009 LAYOUT CONSIDERATIONS As for all switching power supplies, the layout is an important step in the design. Proper function of the device demands careful attention to PCB layout. Care must be taken in board layout to get the specified performance. If the layout is not carefully done, the regulator could show poor line and/or load regulation, stability issues as well as EMI problems. It is critical to provide a low inductance, impedance ground path. Therefore, use wide and short traces for the main current paths. The input capacitor should be placed as close as possible to the IC pins as well as the inductor and output capacitor. Connect the GND Pin of the device to the PowerPad™ of the PCB and use this pad as a star point. Use a common Power GND node and a different node for the Signal GND to minimize the effects of ground noise. Connect these ground nodes together to the PowerPad™ (star point) underneath the IC. Keep the common path to the GND PIN, which returns the small signal components and the high current of the output capacitors as short as possible to avoid ground noise. The FB line should be connected right to the output capacitor and routed away from noisy components and traces (e.g., SW line). COUT VOUT U1 GND 3.3mm VIN CIN L1 Total area 21.5 mm² 6.5 mm Figure 26. Suggested Board Layout Copyright © 2007–2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TPS62270 TPS62272 TPS62273 17 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) TPS62270DRVR ACTIVE WSON DRV 6 3000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 CCX TPS62270DRVT ACTIVE WSON DRV 6 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 CCX TPS62272DRVR ACTIVE WSON DRV 6 3000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 OAM TPS62272DRVT ACTIVE WSON DRV 6 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 OAM TPS62273DRVR ACTIVE WSON DRV 6 3000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 CGW TPS62273DRVT ACTIVE WSON DRV 6 250 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 CGW (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of