TPS61240DRVT - 5V 450mA Boost Converter | Texas Instruments
MPN： TPS61240DRVT ✓ 啟用中TPS61240DRVT 概覽
A boost converter (step-up converter) is a switching power supply topology that produces an output voltage higher than its input. It is part of the DC-DC converter family under switched-mode power supplies (SMPS) within power management ICs. Boost converters use an inductor, switch, diode (or synchronous rectifier), and output capacitor to store and release energy, achieving efficiencies far above what linear regulators can deliver when VIN is well below VOUT.
Key features of the TPS61240DRVT include 90% typical efficiency at nominal operating conditions, 5.0V ±2% total DC output voltage accuracy, 30 µA quiescent current, and best-in-class line and load transient response. The wide input range of 2.3V to 5.5V is ideal for batteries with extended voltage ranges, and the high 3.5 MHz switching frequency enables the use of small inductors and ceramic capacitors in space-constrained portable designs.
The TPS61240DRVT uses a synchronous rectification topology with an internal input valley current limit of 500 mA. Its control architecture minimizes quiescent current while delivering strong transient response, allowing the device to extend battery life across light-load and full-load operating conditions. The exposed thermal pad on the WSON-6 package provides a low thermal resistance path.
Typical applications include USB OTG/peripheral power supplies, single-cell Li-Ion to 5V boost converters, three-cell alkaline-powered portable electronics, MCU/digital logic supply rails, and handheld consumer devices. Its fixed 5V output simplifies USB-powered designs by eliminating the need for external feedback resistors.
When designing with this device, ensure the input valley current limit is not exceeded under maximum load conditions and follow TI's recommended inductor and capacitor values for stable operation. A bypass capacitor close to the IC input is required for noise-sensitive analog rails sharing the boost converter.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 TPS61240DRVT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TPS61240DRVT （相同外形與佔位） — 差異在於 Output Voltage, Package, Input Voltage Range, Topology, Switching Frequency.
TPS61240DRVR
✅ 直接替換聯絡詢價
查看資料表 →TPS61241DRVT
✅ 直接替換📋 參考替代品（不在目錄中）
TPS61240DRVRG4
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS61240YFFT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS61241DRVR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS61240DRVT 最大額定值與電氣特性
| 拓撲 | Boost (Step-Up) |
| 輸入電壓範圍 | 2.3 V to 5.5 V |
| 輸出電壓 | 5.0 V (Fixed) |
| 最大輸出電流 | 450 mA |
| Input Valley Current Limit | 500 mA |
| 切換頻率 | 3.5 MHz (Typical) |
| 靜態電流 | 30 µA (Typical) |
| 效率 | 90% (Nominal Operating Conditions) |
| Output Voltage Accuracy | ±2% |
| 同步整流器 | Yes (Integrated) |
| 工作溫度 | -40 °C to +85 °C |
| 封裝 | WSON-6 (DRV) 2 mm × 2 mm with Exposed Pad |
| 安裝類型 | Surface Mount |
| MSL 等級 | 2 |
| RoHS 狀態 | Compliant |
TPS61240DRVT 腳位配置
| 腳位 1 | VIN — Input voltage supply (2.3 V to 5.5 V) |
| 腳位 2 | GND — Analog ground |
| 腳位 3 | EN — Enable input (active high, internal pull-down) |
| 腳位 4 | NC — Not connected (per datasheet) |
| 腳位 5 | VOUT — Boost converter output (5.0 V fixed) |
| 腳位 6 | SW — Switch node to external inductor |
| 腳位 EP | PGND — Power ground and thermal pad (must be soldered to PCB ground) |
典型應用
TPS61240DRVT 適用於 6 應用s: USB OTG / Peripheral Power Supply, Single-Cell Li-Ion to 5V Boost Converter, Three-Cell Alkaline / NiMH Powered Devices, MCU and Digital Logic 5V Supply Rail, Handheld Consumer / Wearable Devices, Industrial Sensor / IoT Node Power.
USB OTG / Peripheral Power Supply
The TPS61240DRVT's fixed 5.0 V output eliminates external feedback resistors, making it an ideal single-cell Li-Ion to 5 V boost converter for USB OTG and peripheral power rails. The 450 mA output capability covers USB 2.0 downstream port power requirements (500 mA) with margin, while the 90% typical efficiency minimizes battery drain. The 3.5 MHz switching frequency enables use of a 1 µH chip inductor, fitting USB dongle and hub designs within tight footprint constraints. According to TI reference designs, the TPS61240 typically pairs with a TPS2051B power switch for current-limited USB output protection.
推薦
Single-Cell Li-Ion to 5V Boost Converter
The TPS61240DRVT is purpose-built for boosting a single-cell Li-Ion/Li-Polymer battery (2.7 V to 4.2 V nominal) to a stable 5 V rail. The 2.3 V to 5.5 V input range covers the full Li-Ion discharge curve including under-voltage cutoff, while the synchronous topology delivers 90% efficiency at nominal conditions. The 30 µA quiescent current extends standby time in intermittently loaded products like wireless sensors and BLE beacons. TI's TPS61240 datasheet typical application circuit uses a single 1.0 µH inductor and 4.7 µF ceramic input/output capacitors for a complete < 25 mm² solution footprint.
推薦
Three-Cell Alkaline / NiMH Powered Devices
The TPS61240DRVT supports three-cell alkaline, NiCd, or NiMH battery packs (3.0 V nominal, 4.5 V end-of-charge) with its 2.3 V to 5.5 V input range. This is critical for toys, portable instruments, and consumer electronics that need a regulated 5 V rail for digital logic or USB charging from a battery source that swings widely. The 90% efficiency and 30 µA quiescent current maximize battery life, while the WSON-6 (DRV) package with exposed thermal pad handles the boost inductor heat dissipation in continuous-conduction operation.
推薦
MCU and Digital Logic 5V Supply Rail
The TPS61240DRVT generates a clean 5 V rail for 5 V-tolerant MCUs, logic ICs, and display drivers from a 3.3 V system battery. The fixed 5 V output eliminates feedback design complexity, while the ±2% accuracy over line and load ensures tight supply tolerance for digital logic thresholds. Best-in-class line and load transient response per TI's TPS61240 datasheet protects downstream logic during dynamic load steps. The exposed thermal pad of the WSON-6 (DRV) package maintains cool operation under sustained boost duty.
推薦
Handheld Consumer / Wearable Devices
The TPS61240DRVT's tiny 2 mm × 2 mm WSON-6 package, 1.0 µH inductor compatibility, and 30 µA quiescent current make it ideal for space-constrained wearables like fitness bands, smart watches, and wireless earbuds charging cases. Boost efficiency of 90% extends runtime on small Li-Polymer cells, while the synchronous rectification eliminates the external Schottky diode for further board-area savings. TI's TPS61240 datasheet typical application fits in under 25 mm² total, including inductor and ceramic capacitors, suiting sub-100 mA wearable rail designs.
推薦
Industrial Sensor / IoT Node Power
The TPS61240DRVT's wide 2.3 V to 5.5 V input range, 5 V fixed output, and industrial -40 °C to +85 °C operating range make it suitable for industrial IoT sensors powered by 3.6 V lithium-thionyl-chloride primary cells or 3.7 V Li-Ion rechargeable packs. The 450 mA output handles short RF transmit bursts from sub-GHz or BLE radios that share a boost supply. The 90% efficiency and 30 µA quiescent current support multi-year battery life in low-duty-cycle wireless sensor nodes per TI's TPS61240 datasheet application information.
推薦
推薦產品摘要
工程參考資料，適用於 TPS61240DRVT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS61240DRVR | TPS61241DRVT | TPS61240DRVRG4 | TPS61241DRVR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | WSON-6 (DRV) 2x2 mm | WSON-6 (DRV) - same | WSON-6 (DRV) - same | WSON-6 (DRV) - same | WSON-6 (DRV) - same |
| Topology | Synchronous Boost (Step-Up) | Synchronous Boost | Synchronous Boost | Synchronous Boost | Synchronous Boost |
| Input Voltage Range | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Output Voltage | 5.0 V (Fixed) | 5.0 V (Fixed) | 5.0 V (Fixed) | 5.0 V (Fixed) | 5.0 V (Fixed) |
| Maximum Output Current | 450 mA | 450 mA | 450 mA (typ) | 450 mA | 450 mA (typ) |
| Input Valley Current Limit | 500 mA | 500 mA | 600 mA (+20%) | 500 mA | 600 mA (+20%) |
| Switching Frequency | 3.5 MHz | 3.5 MHz | 3.5 MHz | 3.5 MHz | 3.5 MHz |
| Quiescent Current | 30 µA | 30 µA | 30 µA | 30 µA | 30 µA |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
主要差異化特點
- Fixed 5 V output eliminates feedback resistors (對比TPS61240DRVR)
- Higher valley current limit (+20%) for sustained heavy loads (對比TPS61241DRVT)
- Compact WSON-6 (DRV) 2x2 mm package enables < 25 mm² designs (對比TPS61240YFFT)
設計說明
Per TI's TPS61240 datasheet layout guidelines, place the input capacitor, output capacitor, and inductor as close to the IC as possible to minimize switching node parasitic inductance. Use a wide ground plane under the exposed thermal pad (EP) of the WSON-6 package to reduce thermal resistance and provide a low-impedance return path for the high-frequency switching currents. Keep the SW trace short and away from sensitive analog traces to avoid noise coupling.
Do not exceed the 500 mA input valley current limit (use TPS61241 for higher loads). The EN pin has an internal pull-down - leave it floating to disable, or drive high to enable. Avoid using electrolytic output capacitors; the TPS61240 datasheet requires low-ESR ceramic capacitors (X5R/X7R) for stable loop compensation. Per TI's recommended component list, use a 1.0 µH inductor with saturation current above 1 A for full-load operation.
Estimated: At VIN=3.0 V, VOUT=5.0 V, IOUT=450 mA, the boost converter dissipates approximately P = (VOUT-VIN)/VOUT × POUT = 0.4 × 2.25 W = 0.9 W assuming 90% efficiency. With the WSON-6 (DRV) package exposed thermal pad soldered to adequate copper (recommended ≥ 50 mm²), theta_JA is approximately 60 °C/W, giving a junction temperature rise of ~54 °C above 25 °C ambient - well within the 125 °C maximum junction rating.
The TPS61240 supports a true load-disconnect behavior by disabling the synchronous rectifier when EN is low, eliminating DC leakage from input to output. This is critical for battery-powered designs where shutdown current must remain in the single-digit µA range. Per TI's TPS61240 datasheet, total shutdown current is typically < 5 µA. Place a 4.7 µF X5R ceramic capacitor at VOUT to minimize output ripple at heavy load steps.
合規資訊
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified - this is a commercial/industrial-grade part. Lead-free (Pb-free) and halogen-free per TI Material Composition Declaration.
