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Microchip Technology TC115301EMTTR
- Part No.:
- TC115301EMTTR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-89-5/6
- Datasheet:
-
TC115301EMTTR.pdf
- Description:
- IC REG BOOST 3V 100MA SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,751
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Product details
Overview
TC115301EMTTR from Microchip Technology is a PFM/PWM step-up DC/DC converter optimized for 1–3-cell battery systems, delivering a factory-programmed 3.0V output with 85% typical efficiency at 100 mA, 140 mA typical output current at VIN = 2.0V, and assured start-up down to 0.9V - used in portable cameras and palmtop power rails.
For engineers reviewing the TC115301EMTTR datasheet, TC115301EMTTR pinout, TC115301EMTTR application, or TC115301EMTTR equivalent, key selection criteria include low-load PFM efficiency, integrated N-channel switch (1.4 Ω Rswon), SOT-89-5 package constraints, and external diode dependency for boost topology implementation.
Technical Context
The TC115301EMTTR operates in dual-mode regulation: PWM mode above ~10% duty cycle (max 92%) for stable high-load performance, and automatic transition to fixed-duty-cycle PFM mode (17% typ, 25% max) at light loads to reduce supply current to 13 µA (typ) and sustain efficiency. Its PS pin serves as both power input and voltage-sense feedback node, enabling single-point regulation without external resistive dividers.
Internal protection includes LX current limiting via oscillator frequency doubling when VLX exceeds 1.3 V (max), preventing damage during overload; shutdown logic reduces supply current to ≤0.5 µA when SHDN is pulled low, while maintaining an input-to-output leakage path through the external inductor and Schottky diode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-programmed 3.0V ±2.5%; no external feedback resistors required. |
| Start-Up Voltage | 0.9V min; enables operation from single alkaline or NiMH cell at end-of-life. |
| Efficiency | 85% typ at 100 mA load; critical for extending battery runtime in portable devices. |
| Supply Current | 80 µA typ in boost mode; 13 µA typ at no load; enables ultra-low quiescent power design. |
| LX Switch Ron | 1.4 Ω typ; defines conduction loss and thermal rise under 140 mA peak inductor current. |
| Oscillator Frequency | 100 kHz typ (±15 kHz); sets switching ripple frequency and inductor sizing baseline. |
| Shutdown Current | ≤0.5 µA max; essential for system-level power gating in sleep modes. |
| Max Output Current | 140 mA typ at VIN = 2.0V; determines usable load capacity in 2-cell Li-ion or 3-cell NiMH systems. |
Pinout & Package
SOT-89-5 plastic small-outline transistor package (4.5 mm × 2.5 mm × 1.6 mm), surface-mount, with exposed tab for thermal dissipation. Pin 1 is NC (no internal connection); pin 2 is PS (power input + voltage sense); pin 3 is SHDN (active-high enable); pin 4 is LX (internal N-MOSFET drain); pin 5 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No connect | Unused pin; must remain unconnected per datasheet to avoid parasitic coupling. |
| 2 (PS) | Power input & feedback sense | Supplies IC bias and samples regulated output; requires direct connection to VOUT for closed-loop control. |
| 3 (SHDN) | Active-high enable | Pull low to enter ≤0.5 µA shutdown; tie to VIN or VOUT if unused, but note leakage path persists. |
| 4 (LX) | Switch node | Drives external inductor; internal 1.4 Ω N-MOSFET limits peak current to 350 mA; requires Schottky diode (e.g., MA735) to VOUT. |
| 5 (GND) | Ground reference | Single-point grounding recommended for noise reduction; connects to PCB ground plane beneath exposed tab. |
Key Features
| Feature | Design Value |
|---|---|
| PFM/PWM hybrid mode | Automatically shifts to 25% max duty-cycle PFM below ~10% load, reducing no-load current to 13 µA and sustaining >70% efficiency at 10 mA. |
| Integrated N-channel switch | 1.4 Ω Rswon eliminates need for external MOSFET; simplifies BOM and layout but requires careful inductor saturation margining. |
| 0.9V start-up capability | Enables use with depleted single-cell batteries (e.g., 1.0V alkaline), supporting long operational life in pagers and remote controls. |
| Soft-start circuitry | 10 ms typical ramp time prevents inrush current spikes into output capacitor, protecting downstream LDOs and analog circuitry. |
| Thermal-safe oscillator limit | Doubles switching frequency when LX voltage exceeds 1.3 V, shortening ON-time to constrain peak switch current without external current sensing. |
Applications
| Portable Camera Power Supply | Palmtop System Rail Generation |
|---|---|
Use Scenario: Powers CCD sensor and image processor from 1.5–2.5V alkaline or NiMH battery pack in compact digital cameras. IC Role / Device Role / Timing Role: Step-up regulator generating stable 3.0V rail; PS pin senses output directly to maintain regulation without divider network. Use Value: 85% efficiency at 100 mA extends battery life per charge; PFM mode maintains >75% efficiency even at 5 mA standby current. | Use Scenario: Supplies 3.0V logic and display interface in handheld PDAs with tight board space and variable battery voltage (1.0–2.8V). IC Role / Device Role / Timing Role: Primary boost converter with integrated switch; SHDN pin enables system-level power sequencing during suspend/resume cycles. Use Value: 0.9V start-up allows full functionality down to single-cell end-of-life; SOT-89-5 footprint minimizes PCB area vs. SOIC alternatives. |
| Cellular Phone Subsystem Rail | Pager Audio Amplifier Supply |
Use Scenario: Generates clean 3.0V supply for RF front-end or audio codec in legacy GSM handsets using 2-cell NiCd/NiMH packs. IC Role / Device Role / Timing Role: Local DC/DC converter with external Schottky diode (MA735) and 100 µH inductor; LX node drives inductor directly. Use Value: 140 mA output supports burst-mode transmit current; soft-start prevents audio pop during power-on. | Use Scenario: Provides regulated 3.0V for pager speaker driver and microcontroller core in space-constrained, low-cost designs. IC Role / Device Role / Timing Role: High-efficiency boost IC operating in PFM mode during idle periods to minimize average current draw. Use Value: 13 µA no-load supply current extends shelf life; shutdown current ≤0.5 µA enables true zero-power off-state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC115331EMTTR | Factory-programmed 3.3V output; identical pinout, package, and electrical specs otherwise. | Used where 3.3V logic compatibility is required instead of 3.0V; no change to external components needed. | Select TC115331EMTTR only if system voltage tolerance requires 3.3V nominal output; verify load regulation across temperature. |
| MAX680ESA+ | Charge-pump topology (no inductor); fixed 5.0V output; 100 mA max; SO-8 package. | Lower EMI and smaller solution size but limited to 2×VIN; unsuitable for <2.5V input or >100 mA loads. | Choose MAX680ESA+ only for ultra-low-noise, inductor-free 5V generation from ≥2.5V sources; not a functional substitute for TC115301EMTTR's 3.0V boost capability. |
Compared with TC115331EMTTR, the TC115301EMTTR provides tighter voltage matching for 3.0V logic domains; versus MAX680ESA+, it delivers higher output current and lower input voltage support but requires inductor-based layout and EMI mitigation.
Availability
TC115301EMTTR is available at Aetrix Electronics and suitable for portable cameras, palmtop computing systems, and cellular phone subsystems requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for TC115301EMTTR 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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949 certified manufacturing.
The TC115 product line was designed specifically for ultra-low-voltage, high-efficiency boost conversion in space-constrained, battery-powered consumer electronics - emphasizing minimal external component count and sub-1V start-up capability.
FAQ
What is the factory-programmed output voltage of the TC115301EMTTR?
The TC115301EMTTR has a factory-programmed nominal output voltage of 3.0V, with a tolerance of ±2.5% (2.925V to 3.075V) under specified conditions. This fixed output eliminates the need for external feedback resistors, simplifying design and reducing BOM cost. The voltage is set during wafer test and cannot be adjusted in-circuit. TC115301EMTTR achieves this regulation by connecting the PS pin directly to the output node for closed-loop sensing.
Does the TC115301EMTTR require an external switching transistor?
No, the TC115301EMTTR integrates an N-channel MOSFET switch with 1.4 Ω typical ON resistance on the LX pin, eliminating the need for an external transistor. However, it does require an external Schottky diode (e.g., MA735 or 1N5817), inductor, and output capacitor to complete the boost topology. The internal switch supports up to 350 mA peak current, limiting maximum practical output to 140 mA at VIN = 2.0V. TC115301EMTTR's integrated switch reduces component count but mandates careful inductor saturation rating selection.
What is the minimum input voltage required for the TC115301EMTTR to start up and regulate?
The TC115301EMTTR guarantees start-up and regulation at an input voltage as low as 0.9V, making it suitable for single-cell alkaline, NiMH, or lithium primary batteries near end-of-life. This specification is verified under load conditions of IOUT = 1 mA. Below 0.9V, the device will not initiate oscillation or deliver regulated output. TC115301EMTTR achieves this via internal bootstrap circuitry that draws initial current through the external inductor to raise the PS pin voltage and enable full operation.
How does the TC115301EMTTR manage efficiency at very light loads?
The TC115301EMTTR automatically transitions from PWM to pulse-frequency modulation (PFM) mode when output load falls below ~10% of full scale, fixing duty cycle at 17% (typical) and pulsing only as needed to maintain output voltage. This reduces no-load supply current to 13 µA (typical), sustaining >70% efficiency at 10 mA output - significantly better than fixed-frequency PWM converters. TC115301EMTTR's PFM behavior is intrinsic to its architecture and requires no external control signals or configuration.
Can the TC115301EMTTR be used with input voltages higher than its 3.0V output setting?
The TC115301EMTTR is designed exclusively as a step-up (boost) converter and assumes VIN < VOUT (3.0V). If VIN exceeds 3.0V, regulation suspends and supply current drops to 9 µA (typical), while VIN couples to VOUT through the external inductor and Schottky diode - creating an uncontrolled leakage path. TC115301EMTTR does not provide reverse-blocking; system designers must add external isolation (e.g., MOSFET switch or post-regulator LDO with shutdown) if VIN > VOUT operation is possible.
TC115301EMTTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-89-5/6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.9V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-5
TC115301EMTTR FAQ
1.How can I place an order for TC115301EMTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC115301EMTTR 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 TC115301EMTTR reliable?
The price and inventory of TC115301EMTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC115301EMTTR is usually 5 days.
3.What payment methods are accepted for TC115301EMTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC115301EMTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC115301EMTTR?
TC115301EMTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC115301EMTTR 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 TC115301EMTTR?
For technical support, including TC115301EMTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC115301EMTTR requirements.
6.How does Aetrix verify that TC115301EMTTR is sourced from the original manufacturer or authorized distributors?
All TC115301EMTTR 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 TC115301EMTTR meets industry standards.
7.What is the process for return or replacement of TC115301EMTTR?
All TC115301EMTTR units undergo pre-shipment inspection (PSI). If there is an issue with TC115301EMTTR, 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 TC115301EMTTR part is unused and in its original packaging.
Return procedure for TC115301EMTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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