My Inquiry
My Account
Microchip Technology TC1240ECHTR
- Part No.:
- TC1240ECHTR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-6
- Datasheet:
-
TC1240ECHTR.pdf
- Description:
- IC REG CHARGE PUMP 2VIN SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:12,857
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TC1240ECHTR from Microchip Technology is a CMOS charge pump voltage doubler IC in a 6-pin SOT-23A package, designed for low-power portable systems. It accepts 2.5V–4.0V input, delivers ~2×VIN output (e.g., ~5.6V at light load), achieves >99% typical voltage conversion efficiency, features 17Ω typical output resistance, and supports 1 µA shutdown current. It serves as a compact, capacitor-only DC-DC boost solution in battery-powered instrumentation.
For engineers reviewing the TC1240ECHTR datasheet, TC1240ECHTR pinout, TC1240ECHTR application, or TC1240ECHTR equivalent, this page provides verified functional identity, validated pin-level circuit roles, confirmed efficiency and output impedance behavior under defined load conditions, and real-world alternative options with documented technical divergence.
Technical Context
The TC1240ECHTR implements a two-phase switched-capacitor voltage doubler using integrated power MOSFET switches and a fixed 160 kHz internal oscillator. Its operation relies on external C1 (commutation) and C2 (reservoir) capacitors, with no regulation-output voltage droops linearly per VDROOP = IOUT × ROUT.
It uses active-high shutdown logic compatible with 1.8V systems, draws only 180 µA typical supply current, and maintains stable switching frequency across –40°C to +85°C. Output resistance is temperature- and voltage-dependent, specified at ≤30 Ω over full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.5V to +4.0V - defines minimum battery voltage for reliable doubling; below 2.5V, output collapses. |
| Output Voltage | ~2×VIN (e.g., ~5.6V at VIN=2.8V, light load) - unregulated; drops linearly with load per ROUT. |
| Voltage Conversion Efficiency | 97.5% to 99.96% - enables ultra-low quiescent power loss in energy-constrained devices. |
| Output Resistance | 17 Ω typical, ≤30 Ω max - determines load-induced voltage droop; critical for stable biasing of downstream analog stages. |
| Shutdown Current | ≤1.0 µA - allows true off-state power gating in always-on subsystems like RTC or sensor wake logic. |
| Oscillator Frequency | 160 kHz fixed - sets commutation timing; switching frequency is 80 kHz (½ oscillator). |
| Supply Current | 180 µA typical - enables multi-year battery life in intermittent-use handheld instruments. |
Pinout & Package
TC1240ECHTR is housed in a JEITA SC-74A (EIAJ) 6-pin SOT-23A surface-mount package, measuring 3.00 mm × 1.75 mm × 1.30 mm (L × W × A), with 0.95 mm lead pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power supply input | Primary DC input node; must be bypassed with ≥3.3 µF capacitor to GND to suppress switching noise. |
| 2 (GND) | Ground reference | Common return for input, output, and internal oscillator; requires low-impedance PCB plane connection. |
| 3 (C−) | Commutation capacitor negative terminal | Connects to negative side of flying capacitor C1; forms half of charge-transfer path during phase switching. |
| 4 (SHDN) | Active-high shutdown control | Drives internal enable logic; must be pulled low (≤0.4V) to operate; floating state is undefined and prohibited. |
| 5 (VOUT) | Doubled output voltage | Delivers ~2×VIN; output impedance dominates load regulation; requires reservoir capacitor C2 for ripple suppression. |
| 6 (C+) | Commutation capacitor positive terminal | Connects to positive side of flying capacitor C1; completes charge-transfer loop with C− during oscillation phases. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage doubling architecture | Generates stable 2×VIN output without inductors-ideal for space-constrained PCB layouts where magnetic components are prohibited. |
| 99%+ voltage conversion efficiency | Minimizes thermal rise and extends battery runtime in portable medical sensors and data loggers operating at microamp average loads. |
| 1 µA shutdown current | Enables system-level power sequencing where TC1240ECHTR remains powered but inactive between measurement cycles. |
| 180 µA typical supply current | Supports continuous operation from coin cells (e.g., CR2032) for >5 years in low-duty-cycle instrumentation. |
| Only two external capacitors required | Reduces BOM count and assembly cost versus inductor-based DC-DC; eliminates EMI concerns associated with magnetic fields. |
Applications
| Portable Data Loggers | Handheld Test Instruments |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature/humidity at 10-second intervals. IC Role / Device Role / Timing Role: Generates stable +5.5V bias for precision ADC reference and op-amp signal conditioning from a 3.0V Li-ion cell. Use Value: Eliminates need for bulky inductor-based boost converter; 17Ω output resistance ensures <50 mV droop at 2 mA peak load, preserving measurement accuracy. |
Use Scenario: Pocket-sized multimeter requiring dual-rail analog front-end (±5V) derived from single 3.3V supply. IC Role / Device Role / Timing Role: Doubles 3.3V rail to +6.6V, which feeds an inverting charge pump to generate –6.6V; used for op-amp biasing and LCD contrast control. Use Value: Achieves >99% efficiency at light loads, minimizing self-heating that would drift analog measurements; shutdown mode cuts leakage during sleep. |
| Medical Wearables | Industrial Sensor Transmitters |
Use Scenario: Disposable ECG patch with ultra-low-power analog front-end and BLE radio. IC Role / Device Role / Timing Role: Supplies regulated +5.0V to analog signal chain while MCU operates at 1.8V; enabled only during acquisition bursts. Use Value: 1 µA shutdown current prevents battery drain during 99% idle time; 160 kHz oscillator avoids audible noise in sensitive audio-band biosignal paths. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with isolated analog output stage requiring +12V bias. IC Role / Device Role / Timing Role: Cascaded with second TC1240ECHTR to generate ~3×VIN (~9V) from 3.3V auxiliary rail, feeding isolated DC-DC converter. Use Value: Parallel/series scalability per datasheet Figure 5-4/5-5 allows precise voltage scaling without custom magnetics; SOT-23A footprint simplifies conformal coating for harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-doubling charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC1240AECHTR | Wider input range (+2.5V to +5.5V); higher 550 µA typical supply current; 12Ω typical output resistance. | Supports higher-VIN systems (e.g., USB-powered devices); less suitable for sub-4.0V battery operation due to increased quiescent draw. | Select TC1240AECHTR only if input exceeds 4.0V or lower output impedance is required; not drop-in for TC1240ECHTR designs. |
| MAX682ESA+ | Fixed 160 kHz oscillator; 1.5 µA shutdown; 10Ω typical output resistance; requires same 2-capacitor topology. | Better suited for high-precision analog biasing where <10Ω ROUT improves load regulation; pinout incompatible (8-pin SO). | Use MAX682ESA+ when tighter output regulation is needed and board layout permits SO-8; requires PCB redesign. |
Compared with TC1240AECHTR and MAX682ESA+, the TC1240ECHTR offers optimal balance of ultra-low quiescent current (180 µA), proven 17Ω output impedance for mid-range loads, and strict compatibility with 2.5–4.0V battery systems-making it the preferred choice for long-life portable instrumentation where input voltage is tightly bounded.
Availability
TC1240ECHTR is available at Aetrix Electronics and suitable for portable data loggers, handheld test instruments, medical wearables, and industrial sensor transmitters requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TC1240ECHTR 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 Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949 certified wafer fabrication and design facilities.
The TC1240ECHTR belongs to Microchip's legacy charge pump product line, engineered specifically for low-noise, inductorless voltage boosting in space- and power-constrained portable electronics.
FAQ
What is the maximum input voltage rating for the TC1240ECHTR?
The TC1240ECHTR has an absolute maximum input voltage rating of +4.5V. Its operational input range is +2.5V to +4.0V; applying >4.0V may cause excessive output voltage beyond safe limits for downstream components. The TC1240ECHTR is not rated for 5V operation-use TC1240AECHTR instead for inputs up to +5.5V.
Does the TC1240ECHTR provide regulated output voltage?
No, the TC1240ECHTR is an unregulated voltage doubler. Its output voltage equals approximately 2×VIN minus droop determined by load current and output resistance (VDROOP = IOUT × ROUT). At 2 mA load, output drops ~34 mV from no-load value. For regulated output, pair TC1240ECHTR with a low-dropout linear regulator.
What external capacitors are required for basic operation of the TC1240ECHTR?
The TC1240ECHTR requires exactly two external ceramic capacitors: C1 (commutation capacitor, typically 3.3 µF) connected between C+ and C− pins, and C2 (reservoir capacitor, also typically 3.3 µF) connected between VOUT and GND. A third bypass capacitor ≥3.3 µF on VIN is strongly recommended to suppress switching noise.
How does shutdown functionality work on the TC1240ECHTR?
The TC1240ECHTR uses an active-high SHDN pin (Pin 4): pulling SHDN ≥1.4V disables the device, reducing supply current to ≤1.0 µA; pulling SHDN ≤0.4V enables operation. The pin must never float-tie to GND via resistor if permanently enabled. This logic level is fully compatible with 1.8V CMOS outputs.
Can multiple TC1240ECHTR devices be paralleled to reduce output resistance?
Yes, per DS21516D-page 10 Section 5.8, paralleling N TC1240ECHTR units reduces effective output resistance by factor N (e.g., two units yield ~8.5Ω typical). Each unit requires its own C1 capacitor, but they may share one C2 reservoir capacitor-scaled upward proportionally to maintain ripple performance.
TC1240ECHTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 4V
- Voltage - Output (Min/Fixed):
- 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 40mA
- Frequency - Switching:
- 80kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TC1240ECHTR FAQ
1.How can I place an order for TC1240ECHTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1240ECHTR 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 TC1240ECHTR reliable?
The price and inventory of TC1240ECHTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1240ECHTR is usually 5 days.
3.What payment methods are accepted for TC1240ECHTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1240ECHTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1240ECHTR?
TC1240ECHTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1240ECHTR 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 TC1240ECHTR?
For technical support, including TC1240ECHTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1240ECHTR requirements.
6.How does Aetrix verify that TC1240ECHTR is sourced from the original manufacturer or authorized distributors?
All TC1240ECHTR 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 TC1240ECHTR meets industry standards.
7.What is the process for return or replacement of TC1240ECHTR?
All TC1240ECHTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1240ECHTR, 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 TC1240ECHTR part is unused and in its original packaging.
Return procedure for TC1240ECHTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TC1240ECHTR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
