MCP1711T-30I/5X - 150mA, 3.0V Capless LDO | Microchip Technology
MPN: MCP1711T-30I/5X ✓ Hoạt độngMCP1711T-30I/5X Tóm tắt
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage. LDOs sit in the broader hierarchy: linear regulator -> voltage regulator -> power management IC. They are favored over switching regulators when low noise, small solution size, and fast transient response outweigh efficiency considerations, especially in always-on battery-powered systems where quiescent current dominates standby life.
Key features of the MCP1711T-30I/5X include 500 mV dropout at 150 mA load, integrated current foldback that reduces IOUT to ~80 mA at short circuit, a logic-level shutdown input that drops Iq to <0.1 uA, and a power-good output flag. The UQFN-4 (1x1) exposed-pad package achieves a thermal resistance suitable for 150 mA continuous load across the -40C to +85C industrial range without external heatsinking.
Architecturally, the device uses a P-channel MOSFET pass element with a precision bandgap reference, yielding low dropout and excellent line/load regulation. The internal soft-start and current-limit blocks protect downstream circuitry from inrush and fault conditions. The 3.0 V fixed output aligns directly with common MCU and Bluetooth SoC nominal rails.
Typical applications include wearable health monitors, coin-cell powered IoT sensor nodes, energy harvesting systems, Bluetooth Low Energy (BLE) modules, and any battery-powered product that needs a clean 3 V rail directly from a discharged Li-ion cell. A primary design consideration is thermal budget: at VIN = 3.6 V, VOUT = 3.0 V, and 150 mA, the device dissipates ~90 mW. At VIN = 6.0 V, VOUT = 3.0 V, full load, dissipation rises to ~450 mW - verify the PCB copper area is sufficient to keep theta_JA within safe limits.
This page synthesizes distributor pricing from DigiKey, Mouser, Arrow, Octopart, LCSC, and Jotrin; lists same-family drop-in alternatives; and includes practical design notes not aggregated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho MCP1711T-30I/5X — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MCP1711T-30I/5X (cùng hình factor và footprint) — khác nhau ở Dropout Voltage, Input Voltage Range, Output Voltage, Package.
MCP1711T-33I/5X
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MCP1711T-30I/OT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCP1711T-25I/5X
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCP1711T-18I/5X
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCP1711T-50I/5X
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCP1711T-30I/5X Tỷ lệ tối đa & tính chất điện
| Manufacturer | Microchip Technology |
| Part Number | MCP1711T-30I/5X |
| Chức năng | Linear Voltage Regulator IC, Positive Fixed, 1 Output |
| Regulator Topology | Positive Fixed, LDO |
| Điện áp đầu ra | 3.0 V (fixed) |
| Output Current (Maximum) | 150 mA |
| Phạm vi điện áp đầu vào | 1.4 V to 6.0 V |
| Điện áp mất áp | 500 mV (typical, at 150 mA) |
| Quiescent Current (Iq) | 0.6 uA (typical) |
| Kiểu đầu ra | Fixed |
| Số lượng đầu ra | 1 |
| Current Foldback | ~80 mA at 0 V output (typical) |
| Điện áp tắt | <0.1 uA (via SHDN pin) |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Hộp | 4-UQFN (1 mm x 1 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Output Capacitor Required | None (capless - stable without output capacitor) |
| Đầu ra tốt về điện năng | Yes (per datasheet feature list) |
Cấu hình chân MCP1711T-30I/5X
| Chân 1 | VIN — Input voltage supply (1.4 V to 6.0 V) |
| Chân 2 | GND — Ground reference |
| Chân 3 | SHDN — Shutdown input (active-high; tie to VIN if unused) |
| Chân 4 | VOUT — Regulated output voltage (3.0 V fixed) |
| Chân EP | EP — Exposed pad - thermal pad, connect to GND for heat dissipation |
Ứng dụng tiêu biểu
MCP1711T-30I/5X phù hợp cho 6 Áp dụngs: Wearable Health Monitor Power Rail, Coin-Cell Powered IoT Sensor Node, Bluetooth Low Energy (BLE) Module Supply, Energy Harvesting System Buffer, Battery-Powered Remote Control / Wireless Key Fob, Industrial Sensor Transmitter (4-20 mA Loop Powered).
Wearable Health Monitor Power Rail
The MCP1711T-30I/5X is well suited for wearable health monitors (heart-rate, SpO2, temperature patches) where the 3.0 V rail directly feeds a low-power MCU or analog front end. Its 0.6 uA quiescent current extends coin-cell life from months to years, and the capless output removes bulky ceramic capacitors from the small form-factor PCB. At VIN = 3.0 V from a CR2032, dropout margin keeps the rail in regulation across most of the cell discharge curve. The 4-UQFN 1 mm x 1 mm package leaves room for the battery and sensor.
Được đề xuất
Coin-Cell Powered IoT Sensor Node
For IoT sensor nodes that sleep most of the time and wake briefly to transmit, the MCP1711T-30I/5X is an ideal 3.0 V source. The 0.6 uA Iq is negligible compared to the sleeping sensor's own nA-level drain, while the 150 mA peak output handles short radio bursts from BLE or LoRa transmitters. The capless design reduces BOM cost and board area, and the 1.4 V minimum input lets a CR2477 coin cell operate nearly to end-of-life without regulator dropout.
Được đề xuất
Bluetooth Low Energy (BLE) Module Supply
BLE SoCs typically operate from 3.0 V rails and require clean supply to maintain RF performance. The MCP1711T-30I/5X provides a low-ripple 3.0 V output from a Li-ion or LiPo battery without injecting switching noise - a key advantage over buck converters for noise-sensitive radio rails. Its 500 mV dropout at 150 mA allows operation down to ~3.5 V input, well below the Li-ion discharge knee. The exposed-pad UQFN package provides adequate thermal dissipation for sustained transmit bursts.
Được đề xuất
Energy Harvesting System Buffer
In energy-harvesting designs (solar, vibration, thermal), a low-Iq LDO is essential to buffer the harvested source to a stable 3.0 V load. The MCP1711T-30I/5X's 0.6 uA Iq means it consumes less than the harvester's leakage, preserving net energy yield. Its 1.4 V minimum input covers low-output solar cells and rectified RF harvesters. The shutdown pin (SHDN) lets an MCU cut the regulator to <0.1 uA during deep-sleep harvest intervals.
Được đề xuất
Battery-Powered Remote Control / Wireless Key Fob
Remote controls and key fobs rely on CR2032 coin cells and transmit bursts up to 100 mA. The MCP1711T-30I/5X delivers the 3.0 V rail for the transmitter IC while drawing only 0.6 uA standby, keeping the cell usable for the 3-5 year product lifetime. Its capless output saves PCB area inside the cramped key-fob enclosure, and the UQFN-4 1x1 footprint fits next to the battery clip. The shutdown pin extends storage shelf-life before first use.
Được đề xuất
Industrial Sensor Transmitter (4-20 mA Loop Powered)
In 4-20 mA loop-powered industrial sensors, the MCP1711T-30I/5X can serve as a low-drop post-regulator deriving a clean 3.0 V rail from the loop voltage. The 500 mV dropout allows efficient operation even at the lowest loop voltages (~3.5 V). The 0.6 uA Iq is small relative to the 4 mA loop quiescent budget. The -40 C to +85 C industrial temperature rating covers process-control environments, and the exposed-pad package ensures thermal stability on the loop transmitter PCB.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MCP1711T-30I/5X — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MCP1711T-33I/5X | MCP1711T-30I/OT | MCP1711T-25I/5X | MCP1711T-18I/5X | MCP1711T-50I/5X |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 4-UQFN (1x1) | 4-UQFN (1x1) - same | 4-UQFN (1x1) - same | 4-UQFN (1x1) - same | 4-UQFN (1x1) - same | 4-UQFN (1x1) - same |
| Output Voltage | 3.0 V | 3.3 V | 3.0 V | 2.5 V | 1.8 V | 5.0 V |
| Output Current | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA |
| Input Voltage Range | 1.4 V to 6.0 V | 1.4 V to 6.0 V | 1.4 V to 6.0 V | 1.4 V to 6.0 V | 1.4 V to 6.0 V | 1.4 V to 6.0 V |
| Quiescent Current (Iq) | 0.6 uA | 0.6 uA | 0.6 uA | 0.6 uA | 0.6 uA | 0.6 uA |
| Dropout Voltage | 500 mV at 150 mA | 500 mV at 150 mA | 500 mV at 150 mA | 500 mV at 150 mA | 500 mV at 150 mA | 500 mV at 150 mA |
| 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 | -40 C to +85 C |
| Unit Price (qty 1) | $0.30 | $0.30 | $0.30 | $0.30 | $0.30 | $0.30 |
Bảo phân biệt quan trọng
- Ultra-low 0.6 uA quiescent current (vsMCP1700 (1.6 uA Iq))
- Capless output stability (vsMCP1700 (requires output capacitor))
- Integrated power-good output (vsMCP1700 (no power-good flag))
- Smaller 1 mm x 1 mm UQFN footprint (vsLarger SOT-23 LDO alternatives)
Ghi chú thiết kế
Estimated: at VIN = 6.0 V, VOUT = 3.0 V, IOUT = 150 mA, power dissipation is (6.0 - 3.0) x 0.150 = 450 mW. The UQFN-4 1x1 exposed-pad package has theta_JA around 100-150 C/W on a 1 oz 4-layer 1 sq inch copper pad, so junction temperature rises 45-67 C above ambient. At maximum ambient of 85 C, junction temperature reaches 130-152 C - above the 150 C typical thermal shutdown. For sustained VIN >= 5 V operation, reduce VIN closer to VOUT or limit IOUT to 100 mA. Source: Microchip MCP1711 datasheet 20005415D.
The exposed pad (EP) of the UQFN-4 package must be soldered to a PCB thermal pad connected to GND for both electrical grounding and heat dissipation. Place a continuous ground plane beneath the IC and stitch vias from the thermal pad to the inner ground plane. Avoid routing signal traces under the UQFN-4 footprint. Source: Microchip MCP1711 datasheet 20005415D recommended PCB land pattern.
Do not leave the SHDN pin floating - tie it to VIN if shutdown control is not needed. A floating SHDN can drift to mid-rail, causing unpredictable output behavior. The shutdown current is <0.1 uA only when SHDN is driven low; a mid-rail SHDN can pull significant bias current. Source: Microchip MCP1711 datasheet 20005415D. Also: although the output is capless-stable, a 0.1 uF X7R bypass close to VOUT can reduce noise pickup in RF applications.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified (industrial grade -40 C to +85 C, not automotive). Halogen-free per Microchip environmental compliance statement.
