TPS79933DRVR - 200mA, 3.3V Fixed LDO, Low Noise | Texas Instruments
料号： TPS79933DRVR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.55 | $5.50 |
| 100 | $0.45 | $45.00 |
| 500 | $0.38 | $190.00 |
| 1,000 | $0.32 | $320.00 |
| 3,000 | $0.26 | $780.00 |
TPS79933DRVR 概述
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only slightly above the output voltage. Within the broader taxonomy, an LDO is a subclass of linear regulator, which itself sits under voltage regulators and finally under power management ICs (PMICs). Unlike switching regulators, LDOs add no switching ripple but dissipate (VIN - VOUT) x IOUT as heat, so they are favored for noise-sensitive analog and RF rails.
Key features include 200 mA continuous output current, 3.3 V fixed output (with -33 suffix in the family), high PSRR of 66 dB at 1 kHz and 51 dB at 10 kHz to reject upstream switching ripple, and 40 uA typical quiescent current for battery-powered designs. The WSON-6 (DRV) 2x2 mm package with exposed thermal pad provides a low theta_JA suitable for space-constrained wearables, handsets, and IoT nodes.
Architecturally, the TPS79933 uses a PMOS pass element driven by a precision bandgap reference, with internal compensation that only requires 1 uF ceramic output capacitance for stability. The 2x2 mm WSON footprint is the same pad pattern used across the TPS799xx family, so different output-voltage variants (1.2 V, 1.5 V, 1.8 V, 2.5 V, 2.8 V, 3.0 V, 3.3 V, 4.5 V) and the adjustable version can be interchanged without PCB rework.
Typical applications include low-noise power for handsets and smartphones, wireless modules and IoT sensor nodes, portable battery-powered equipment (PMICs, MCUs, sensors), and post-regulation after a switching converter to clean residual ripple for ADC, DAC, RF, or audio blocks.
When designing, hold input-to-output headroom below the dropout spec, place input/output ceramics within ~2 mm of the pins, and tie the exposed pad to a ground copper pour of at least 10 mm^2 for adequate heat spreading.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： TPS79933DRVR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TPS79933DRVT
✅ 直接替换📋 参考替代料（不在目录中）
TPS79918DRVR
✅ 直接替换📋 参考替代料（不在目录中）
TPS79925DRVR
✅ 直接替换📋 参考替代料（不在目录中）
TPS79930DRVR
✅ 直接替换📋 参考替代料（不在目录中）
TPS79945DRVR
✅ 直接替换📋 参考替代料（不在目录中）
TLV70033DDCR
✅ 直接替换📋 参考替代料（不在目录中）
TPS79933DRVR 最大额定值与电气特性
| 输出类型 | Fixed |
| 输出电压 | 3.3 V |
| 最大输出电流 | 200 mA |
| 输入电压范围 | 2.7 V to 6.5 V |
| Dropout Voltage (typical) | 90 mV at 200 mA |
| Quiescent Current (typical) | 40 uA |
| PSRR | 66 dB at 1 kHz, 51 dB at 10 kHz |
| 使能引脚 | Yes (active-high, with inrush protection) |
| Output Capacitor | 1 uF ceramic minimum for stability |
| 工作温度范围 | -40 C to +125 C |
| 封装 | WSON-6 (DRV) 2x2 mm with exposed pad |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
TPS79933DRVR 引脚配置
| 引脚 1 | IN — Input supply voltage (2.7 V to 6.5 V) |
| 引脚 2 | GND — Ground |
| 引脚 3 | EN — Enable input, active-high with inrush current protection |
| 引脚 4 | NC — Not connected (per datasheet) |
| 引脚 5 | OUT — Regulated 3.3 V output (1 uF ceramic cap required for stability) |
| 引脚 6 | NC — Not connected (per datasheet) |
| 引脚 EP | Thermal Pad — Exposed thermal pad, tie to GND plane for heat dissipation |
典型应用
TPS79933DRVR 适用于 6 应用s: Smartphone Handset Power Rails, Wireless IoT Sensor Nodes, Post-Regulation After Switching Converter, Portable Battery-Powered Equipment, Wearables and Hearables, Industrial Sensor Conditioning.
Smartphone Handset Power Rails
The TPS79933DRVR's 40 uA quiescent current and 2.7-6.5 V input range make it ideal for smartphone handsets drawing from a single-cell Li-Ion battery (3.0 V to 4.2 V). The fixed 3.3 V output can power low-noise analog blocks such as audio codecs, MEMS microphones, and PMU auxiliary rails. With only 1 uF ceramic output capacitance required and a 2x2 mm WSON footprint, it fits under shielded cans where height and area are constrained, while 66 dB PSRR at 1 kHz rejects charger switching ripple before it leaks into the audio band.
推荐
Wireless IoT Sensor Nodes
Battery-powered IoT sensor nodes running BLE, LoRa, or Zigbee radios benefit from the TPS79933DRVR's 40 uA quiescent current and high PSRR. The LDO can post-regulate a switching converter's 3.3 V rail to provide a quiet supply for the wireless MCU and analog front-end. The 6-pin WSON (DRV) 2x2 mm package fits sensor modules under 10x10 mm, and the active-high EN pin allows the host MCU to power-gate the LDO during deep-sleep, dropping battery drain to a few microamps.
推荐
Post-Regulation After Switching Converter
Following a switching buck regulator, the TPS79933DRVR cleans residual high-frequency ripple from the DC-DC output, providing a sub-100 uVrms noise floor for downstream precision loads. With 66 dB PSRR at 1 kHz and 51 dB at 10 kHz, the LDO attenuates fundamental and first-harmonic switching noise common at 1-3 MHz converter frequencies. The 200 mA rating handles analog signal-chain ICs, RF transceiver VCOs, and 24-bit sigma-delta ADC references.
推荐
Portable Battery-Powered Equipment
Handheld test instruments, portable medical monitors, and field data loggers benefit from the TPS79933DRVR's low IQ and wide 2.7-6.5 V input range accepting 2xAA, single-cell Li-Ion, or USB-derived 5 V rails. The 90 mV typical dropout at 200 mA allows sustained operation even as the battery sags toward 3.4 V. The exposed thermal pad spreads heat across PCB copper for extended 200 mA loads, while 1 uF output capacitance minimizes BOM cost and board space.
推荐
Wearables and Hearables
True wireless earbuds, smart watches, and fitness bands require sub-2x2 mm power solutions with clean outputs for Bluetooth SoCs, MEMS microphones, and PMIC aux rails. The TPS79933DRVR's WSON-6 2x2 mm package with exposed pad fits inside tight wearable enclosures. With 40 uA IQ the regulator contributes negligibly to standby drain, while 66 dB PSRR prevents upstream charger-switching noise from coupling into the sensitive microphone bias rail.
推荐
Industrial Sensor Conditioning
Factory-automation sensor nodes, 4-20 mA loop-powered transmitters, and industrial IoT edge devices benefit from the TPS79933DRVR's -40 C to +125 C junction rating, robust 6.5 V absolute-max input tolerance, and high PSRR for noisy 24 V industrial bus environments. When paired with a front-end buck or LDO, the TPS79933 provides a quiet 3.3 V rail for ADC references, MEMS accelerometers, and isolated digital interfaces, while the enable pin allows host-controlled power sequencing.
推荐
推荐产品汇总
工程参考数据： TPS79933DRVR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TPS79933DRVT | TPS79918DRVR | TPS79925DRVR | TPS79930DRVR | TPS79945DRVR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | WSON-6 (DRV) 2x2 mm | WSON-6 (DRV) 2x2 mm - same | WSON-6 (DRV) 2x2 mm - same | WSON-6 (DRV) 2x2 mm - same | WSON-6 (DRV) 2x2 mm - same | WSON-6 (DRV) 2x2 mm - same |
| Output Voltage | 3.3 V | 3.3 V (same) | 1.8 V | 2.5 V | 3.0 V | 4.5 V |
| Output Current | 200 mA | 200 mA | 200 mA | 200 mA | 200 mA | 200 mA |
| Input Voltage Range | 2.7 V to 6.5 V | 2.7 V to 6.5 V | 2.7 V to 6.5 V | 2.7 V to 6.5 V | 2.7 V to 6.5 V | 2.7 V to 6.5 V |
| Dropout Voltage (typ @ 200 mA) | 90 mV | 90 mV | 90 mV | 90 mV | 90 mV | 90 mV |
| Quiescent Current (typ) | 40 uA | 40 uA | 40 uA | 40 uA | 40 uA | 40 uA |
| PSRR | 66 dB at 1 kHz | 66 dB at 1 kHz | 66 dB at 1 kHz | 66 dB at 1 kHz | 66 dB at 1 kHz | 66 dB at 1 kHz |
| Enable Pin | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) |
关键差异点
- Lowest quiescent current in TI's 200 mA LDO family （对比 TPS79918DRVR (different VOUT))
- Single-package family footprint for output-voltage flexibility （对比 TPS79933YZUT (different package))
- High PSRR for post-regulator applications （对比 TLV70033DDCR (different package))
设计说明
Estimated: at VIN = 5 V, VOUT = 3.3 V, IOUT = 200 mA, the TPS79933DRVR dissipates approximately (5 - 3.3) x 0.2 = 0.34 W. The WSON-6 (DRV) package with exposed thermal pad has a theta_JA in the 60-80 C/W range on a standard 4-layer 1-oz JEDEC test board, giving a junction temperature rise of about 20-27 C above ambient at full load. Always tie the exposed pad to a continuous GND copper pour of at least 10 mm^2 to spread heat; without it, sustained full-load operation can overheat in enclosed enclosures above 60 C ambient.
Place the 1 uF X5R/X7R ceramic output capacitor within 2 mm of the OUT pin (pin 5) to keep the ESR loop small and ensure stability. Add a 0.1 uF ceramic bypass cap near the IN pin (pin 1) to suppress high-frequency ringing from upstream switching converters. The exposed thermal pad must be soldered to a GND plane with multiple thermal vias for proper heat conduction. Avoid routing high-impedance analog signal traces under the LDO to prevent ground-noise coupling into sensitive nodes.
Do not confuse the WSON-6 (DRV) package code with the SOT-23-5 (DDC) or 5-pin DSBGA (YZU) packages - all three exist in the TPS79933 family but only DRV is the 6-pin WSON described here. Substituting a different package variant onto a TPS79933DRVR PCB footprint will result in pin shorts. Also, ensure VIN never exceeds 6.5 V continuous or 7 V transient; the absolute-maximum rating is 7 V. The EN pin has an internal pull-down; if left floating the part defaults to disabled.
Keep the LDO input/output loop areas as small as possible to minimize EMI and improve PSRR at high frequencies. Route the EN trace away from noisy digital or switching-node traces to prevent false triggering. Use a star-ground topology with the TPS79933DRVR's GND pin (pin 2) tied directly to the system ground plane, and connect the exposed pad to the same ground plane through a low-impedance path. Place a 10 uF bulk input capacitor if the LDO is more than 50 mm from the upstream source.
合规信息
RoHS and REACH compliant per TI product page; lead-free and halogen-free per WSON package materials disclosure. Standard part is not AEC-Q100 qualified - automotive designers should consider TPS79933QDDCRQ1 (Q1 suffix) for AEC-Q100 grade, noting its different package.
