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STMicroelectronics LF60CDT
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- Part No.:
- LF60CDT
- Manufacturer:
- STMicroelectronics
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
LF60CDT.pdf
- Description:
- IC REG LINEAR 6V 500MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,774
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Product details
Overview
LF60CDT from STMicroelectronics is a 6.0 V fixed-output, very low dropout (LDO) linear regulator in TO-220FP package with logic-controlled shutdown, 500 mA output current capability, 0.45 V typical dropout at 200 mA, and ±2% output voltage accuracy at 25°C. It operates across –40 to +125°C and supports battery-powered systems requiring ultra-low quiescent current (50 µA in OFF mode).
For engineers reviewing the LF60CDT datasheet, LF60CDT pinout, LF60CDT application, or LF60CDT equivalent, key selection considerations include its TTL-compatible enable input (Pin 2), minimal 2.2 µF output capacitor requirement, internal thermal/current limiting, 80 dB supply voltage rejection at 120 Hz, and suitability for space-constrained, low-noise local regulation in portable instrumentation and automotive body electronics.
Technical Context
The LF60CDT implements a PNP pass transistor architecture enabling sub-0.5 V dropout performance while maintaining stability with only 2.2 µF ceramic output capacitance (ESR 0.1–10 Ω). Its integrated shutdown circuit accepts TTL-level control signals (VIL ≤ 0.8 V, VIH ≥ 2.0 V) directly, eliminating external level-shifting components.
Thermal design is supported by a junction-to-case thermal resistance of 5°C/W (TO-220FP), allowing >3 W power dissipation with moderate heatsinking. The device features internal foldback current limiting and thermal shutdown, with guaranteed operation over full industrial temperature range (–40°C to +125°C junction).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 6.0 V ±2% at 25°C - ensures stable rail for 6 V logic or analog subsystems without trimming |
| Dropout Voltage | 0.45 V typ. at 200 mA - enables regulation from 6.45 V input, extending battery runtime in 7.2 V Li-ion or 9 V alkaline systems |
| Quiescent Current | 50 µA typ. in OFF mode - minimizes standby leakage in always-on monitoring circuits |
| Output Current | 500 mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs on local rails |
| Supply Rejection | 80 dB typ. at 120 Hz - suppresses ripple from switching pre-regulators or noisy DC sources |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Stability Cap | 2.2 µF ceramic (ESR 0.1–10 Ω) - reduces board area and BOM cost vs. larger electrolytic solutions |
Pinout & Package
LF60CDT is housed in a 5-pin TO-220FP package with heat sink tab (Pin 3), featuring vertical mounting and improved thermal performance over standard TO-220. Pin 1 = Input, Pin 2 = Shutdown (TTL-compatible), Pin 3 = Ground/Tab, Pin 4 = Output, Pin 5 = Bypass (not used in fixed-voltage configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input (VI) | Unregulated DC input (2.5–16 V); connects to upstream supply or filter capacitor |
| Pin 2 | Shutdown Control (VC) | TTL-compatible enable: <0.8 V = OFF (50 µA IQ), >2.0 V = ON (500 µA IQ) |
| Pin 3 | Ground / Heat Sink Tab | Electrical ground reference and primary thermal path; must be soldered to PCB copper pour |
| Pin 4 | Output (VO) | Regulated 6.0 V output; requires 2.2 µF ceramic capacitor to ground for stability |
| Pin 5 | Bypass (NC for fixed VO) | No-connect in LF60CDT; reserved for adjustable versions (e.g., LFxxAB/C with external resistor divider) |
Key Features
| Feature | Design Value |
|---|---|
| Logic-Controlled Shutdown | Direct TTL interface (Pin 2) enables system-level power sequencing without external MOSFET or driver |
| Ultra-Low Dropout | 0.45 V typical at 200 mA allows operation with minimal headroom-critical for single-cell LiFePO₄ or dual-cell NiMH systems |
| Low-Noise Regulation | 50 µV RMS output noise (10 Hz–100 kHz) preserves signal integrity in ADC references and RF bias rails |
| Robust Protection | Integrated current limiting and thermal shutdown prevent damage during overload or ambient temperature excursions |
| Wide Input Range | 2.5 V to 16 V input supports diverse sources: USB PD, automotive batteries, and industrial 12 V rails |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Powering low-power ECG front-end amplifiers and SAR ADCs in handheld patient monitors. IC Role / Device Role / Timing Role: Local 6 V LDO providing clean, stable analog supply independent of main system rail noise. Use Value: 50 µV noise and 80 dB SVR ensure <1 LSB error in 16-bit medical-grade data acquisition. | Use Scenario: Regulating power for door module microcontrollers and LIN transceivers in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Primary 6 V supply with shutdown controlled by MCU GPIO to reduce parasitic drain during sleep modes. Use Value: 50 µA OFF-mode current extends battery life beyond ISO 19453-2 requirements for 30-day parking scenarios. |
| Industrial IoT Edge Nodes | Smart Energy Meters |
Use Scenario: Supplying LoRaWAN radio SoCs and precision RTCs in battery-operated sensor gateways. IC Role / Device Role / Timing Role: Low-dropout regulator enabling direct step-down from 7.2 V Li-ion packs without intermediate buck stage. Use Value: 0.45 V dropout extends usable battery capacity by ~12% compared to legacy 1.2 V-drop regulators. | Use Scenario: Generating isolated 6 V rail for metrology ADCs and tamper-detection comparators in revenue-grade meters. IC Role / Device Role / Timing Role: High-accuracy (±2%) fixed-output LDO ensuring consistent reference voltage across temperature and line variations. Use Value: ±2% tolerance at –40°C to +85°C meets IEC 62053-21 Class 0.2 active energy measurement accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LDL112PU33R | 3.3 V fixed output, 200 mA, 170 mV dropout, DFN10 package | Lower current, lower dropout, no shutdown pin - suited for compact digital rails only | Select when footprint and ultra-low dropout outweigh need for 6 V output and 500 mA drive |
| LD3985M60R | 6.0 V fixed, 500 mA, 200 mV dropout, SOT-223 package, no shutdown | Same output but no enable function; smaller thermal mass limits sustained 500 mA in high ambient | Choose for cost-sensitive, non-sequenced applications where board space is constrained and shutdown is unnecessary |
Compared with LDL112PU33R and LD3985M60R, LF60CDT uniquely combines 6 V output, 500 mA drive, TTL shutdown, and TO-220FP thermal robustness-making it the only option among the three qualified for automotive body control and industrial edge nodes requiring both sequencing and thermal resilience.
Availability
LF60CDT is available at Aetrix Electronics and suitable for automotive body electronics, portable medical instrumentation, industrial IoT edge nodes, and smart energy metering requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LF60CDT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in power management, microcontrollers, and automotive-grade analog ICs.
The LF00 series was designed specifically for low-noise, low-power local regulation in battery-operated and thermally demanding systems-emphasizing ultra-low dropout, minimal external components, and robust protection.
FAQ
What is the minimum input voltage required for regulation at full 500 mA load?
The LF60CDT requires VI ≥ VO + VDROP. At 500 mA, max dropout is 0.7 V (per datasheet Table 9), so minimum input is 6.0 V + 0.7 V = 6.7 V. Below this, output voltage drops linearly with input; regulation is not maintained.
Can Pin 5 (Bypass) be left floating in the LF60CDT?
Yes. Pin 5 is a no-connect (NC) in fixed-output variants like LF60CDT. It is internally unused and may be left unconnected or tied to ground-neither affects regulation, stability, or protection behavior.
Is the TO-220FP package RoHS-compliant and lead-free?
Yes. STMicroelectronics certifies the LF60CDT TO-220FP package as RoHS-compliant and lead-free per EU Directive 2011/65/EU, with matte tin plating on leads and halogen-free molding compound.
How does the LF60CDT behave during thermal shutdown?
When junction temperature exceeds ~165°C, the device disables the pass transistor, dropping output to near zero volts while drawing only 50 µA. It automatically recovers once TJ falls below ~145°C hysteresis threshold-no external reset required.
LF60CDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 1 mA
- Current - Supply (Max):
- 12 mA
- PSRR:
- 75dB ~ 60dB (120Hz ~ 10kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
LF60CDT FAQ
1.How can I place an order for LF60CDT through Aetrix?
Please submit a Request for Quotation (RFQ) for LF60CDT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LF60CDT reliable?
The price and inventory of LF60CDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF60CDT is usually 5 days.
3.What payment methods are accepted for LF60CDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF60CDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF60CDT?
LF60CDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF60CDT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LF60CDT?
For technical support, including LF60CDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF60CDT requirements.
6.How does Aetrix verify that LF60CDT is sourced from the original manufacturer or authorized distributors?
All LF60CDT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LF60CDT meets industry standards.
7.What is the process for return or replacement of LF60CDT?
All LF60CDT units undergo pre-shipment inspection (PSI). If there is an issue with LF60CDT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LF60CDT part is unused and in its original packaging.
Return procedure for LF60CDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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