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Microchip Technology TC1304-VI0EMF
- Part No.:
- TC1304-VI0EMF
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1304-VI0EMF.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,547
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Product details
Overview
TC1304-VI0EMF from Microchip Technology is a dual-output power management IC integrating a 500 mA synchronous buck regulator and a 300 mA low-dropout linear regulator (LDO), with sequenced startup/shutdown, 300 ms power-good delay, 65 µA typical quiescent current, and operation from -40°C to +125°C junction temperature. It delivers tightly regulated core and bias voltages for portable processors in USB-powered devices.
For engineers reviewing the TC1304-VI0EMF datasheet, TC1304-VI0EMF pinout, TC1304-VI0EMF application, or TC1304-VI0EMF equivalent, key selection criteria include output sequencing control, dual-rail regulation tolerance (±0.3%), LDO dropout voltage (137 mV @ 200 mA), buck efficiency (>90% at heavy load), and open-drain PG output with 94% VOUT threshold.
Technical Context
The TC1304-VI0EMF implements independent internal compensation for both regulators, eliminating external compensation components. Its buck stage operates at a fixed 2.0 MHz PWM frequency under heavy load and automatically transitions to PFM mode at light loads to maintain ultra-low quiescent current.
Sequencing logic ensures VOUT2 (LDO) powers up before VOUT1 (buck) and shuts down after it - critical for avoiding reverse-bias conditions in multi-rail systems. The PG output monitors both outputs simultaneously and asserts after a precise 300 ms delay once both reach regulation within ±6% of nominal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA maximum - supports processor core rails requiring stable mid-current delivery without external MOSFETs |
| LDO Output Current | 300 mA maximum - supplies auxiliary I/O or memory bias rails with minimal board area (1 µF output cap) |
| Quiescent Current | 65 µA typical - enables >100-hour battery life in always-on portable medical instruments |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - allows operation with input as low as VOUT2 + 0.137 V, maximizing battery utilization |
| Power-Good Delay | 300 ms fixed - provides clean reset timing for ARM Cortex-M or RISC-V microcontrollers during cold start |
| Operating Temperature | -40°C to +125°C junction - qualified for automotive cabin and industrial edge computing environments |
| Switching Frequency | 2.0 MHz ±0.4 MHz - enables use of compact 4.7 µH inductors and reduces EMI filtering burden |
Pinout & Package
TC1304-VI0EMF is housed in a thermally enhanced 10-pin 3×3 mm DFN package with exposed pad (EP) connected to AGND. Pin pitch is 0.5 mm; recommended solder profile follows IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low global shutdown input | Initiates controlled sequencing: LDO disables first, then buck; logic-high (>45% VIN) enables both outputs |
| 2 - VIN2 | LDO input supply | Accepts same input source as VIN1; must be routed with minimal trace length to reduce noise coupling into LDO path |
| 3 - VOUT2 | LDO regulated output | Delivers fixed 3.3 V (per VI0 suffix); requires ≥1 µF ceramic capacitor to AGND for stability |
| 4 - PG | Open-drain power-good indicator | Pulls low when both VOUT1 and VOUT2 are within 94–96% of target; 300 ms delay built-in |
| 5 - AGND | Analog ground reference | Must connect to dedicated analog ground plane; separate from PGND to minimize switching noise injection |
| 6 - PGND | Power ground return | Carries high-frequency buck switch current; requires low-inductance connection to input capacitor negative |
| 7 - LX | Buck switch node | Connects to external inductor; carries pulsed current up to 700 mA peak; layout critical for EMI and efficiency |
| 8 - VIN1 | Buck input supply | Accepts 2.7–5.5 V; shared with VIN2 per design note; decoupling capacitor required near pin |
| 9 - VFB1/VOUT1 | Buck feedback or output sense | VI0 variant uses fixed 1.2 V output; pin tied directly to VOUT1 - no external divider needed |
| 10 - EP | Exposed thermal pad | Internally connected to AGND; must be soldered to PCB thermal plane for θJA = 41°C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Sequenced startup/shutdown | Guarantees VOUT2 powers up before VOUT1 and powers down after - prevents backfeeding and latch-up in multi-rail SoCs |
| Auto PWM-to-PFM transition | Maintains <100 µA total IQ across 0–500 mA buck load range without firmware or external control |
| Dual-output power-good monitoring | Single PG signal asserts only when both outputs meet regulation criteria - eliminates need for discrete OR-ing logic |
| Internal compensation | Removes requirement for external compensation networks on either regulator, reducing BOM count and layout complexity |
| Overtemperature & short-circuit protection | Thermal shutdown at 165°C with 10°C hysteresis; current-limited LDO output survives sustained 1 Ω short |
Applications
| USB-Powered Portable Instrument | Low-Power Industrial Sensor Node |
|---|---|
Use Scenario: Handheld blood glucose meter powered via USB 5 V input with ARM-based MCU requiring 1.2 V core and 3.3 V peripheral rail. IC Role / Device Role: TC1304-VI0EMF generates both rails while sequencing VOUT2 (3.3 V) before VOUT1 (1.2 V) to satisfy MCU boot requirements. Use Value: 65 µA quiescent current extends single-charge battery life beyond 120 hours; 300 ms PG delay ensures reliable MCU reset assertion. | Use Scenario: Wireless temperature sensor node operating from Li-ion (3.0–4.2 V) with ultra-low sleep current and fast wake-up. IC Role / Device Role: Provides 3.3 V for RF transceiver and 1.2 V for ultra-low-power MCU, with sequenced enable to prevent I/O contention during wake. Use Value: PFM mode cuts IQ to <100 µA in sleep; LDO's 137 mV dropout enables operation down to 3.43 V input - extending usable battery range by 12%. |
| Medical Pulse Oximeter | Embedded Automotive Cabin Controller |
Use Scenario: Battery-operated pulse oximeter with optical front-end, ADC, and BLE radio needing isolated, low-noise 3.3 V and 1.2 V supplies. IC Role / Device Role: Delivers clean, sequenced dual rails; LDO output supplies noise-sensitive analog/RF sections; buck powers digital core. Use Value: 1.8 µV/√Hz LDO output noise and >62 dB PSRR below 100 Hz ensure ADC SNR remains >85 dB. | Use Scenario: HVAC control module in vehicle cabin with ambient temperature range -40°C to +85°C and ASIL-B functional safety constraints. IC Role / Device Role: Supplies 1.2 V MCU core and 3.3 V CAN transceiver interface; PG signal feeds system watchdog timer. Use Value: -40°C to +125°C junction rating and integrated UVLO/OTP ensure robust operation across full automotive thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC1303C-VI0EMF | Same dual-regulator architecture but lacks sequencing logic; SHDN1/SHDN2 pins control buck and LDO independently | Requires external timing circuitry to replicate TC1304-VI0EMF's built-in sequencing behavior | Select when independent enable control is preferred over automatic sequencing |
| TPS65023RGZR | Triple-output PMIC (2 buck + 1 LDO); higher IQ (80 µA); no integrated PG delay; 16-pin QFN | Supports additional rail (e.g., 1.8 V I/O) but adds complexity and footprint; PG requires external RC timing | Select when third regulated output is required and sequencing is managed externally |
Compared with TC1303C-VI0EMF and TPS65023RGZR, TC1304-VI0EMF uniquely integrates sequencing control and fixed 300 ms PG delay in a compact 10-pin DFN - reducing external component count and PCB area for space-constrained portable designs.
Availability
TC1304-VI0EMF is available at Aetrix Electronics and suitable for USB-powered devices, handheld medical instruments, and low-power industrial sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for TC1304-VI0EMF 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 leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The TC1303/TC1304 product line was engineered specifically for portable and battery-powered applications demanding high integration, ultra-low quiescent current, and reliable dual-rail power sequencing in minimal footprint.
FAQ
What output voltages does the TC1304-VI0EMF provide?
The TC1304-VI0EMF delivers a fixed 1.2 V output from its synchronous buck regulator (VOUT1) and a fixed 3.3 V output from its low-dropout linear regulator (VOUT2), as indicated by the "VI0" suffix per Microchip's ordering guide. Both outputs are internally trimmed to ±0.3% tolerance over temperature and line, eliminating need for external feedback resistors.
How does the power-good (PG) function operate on the TC1304-VI0EMF?
The TC1304-VI0EMF's PG pin is an open-drain output that asserts low only after both VOUT1 and VOUT2 reach and sustain ≥94% of their nominal values for 300 ms. It monitors both regulators simultaneously - unlike TC1303A/B variants - and provides a clean, debounced reset signal compatible with standard microcontroller reset inputs.
Does the TC1304-VI0EMF require external compensation components?
No, the TC1304-VI0EMF features fully internal compensation for both the buck regulator and LDO stages. This eliminates external compensation capacitors and resistors, simplifying design, reducing BOM cost, and improving layout robustness - especially critical in high-density portable PCBs where routing space is constrained.
What is the shutdown behavior of the TC1304-VI0EMF during sequencing?
When SHDN is pulled low, the TC1304-VI0EMF initiates controlled shutdown: the LDO (VOUT2) disables first, followed by the buck regulator (VOUT1) after a brief interval. This reverse sequencing prevents backflow from the LDO into the buck output, protecting downstream circuitry and ensuring safe power-down in multi-rail systems.
Can the TC1304-VI0EMF operate from a single 3.3 V input supply?
Yes, the TC1304-VI0EMF supports input voltages from 2.7 V to 5.5 V on both VIN1 and VIN2. With VOUT1 = 1.2 V and VOUT2 = 3.3 V, a 3.3 V input is sufficient for the LDO (dropout = 137 mV @ 200 mA), but the buck regulator requires VIN1 ≥ VOUT1 + dropout ≈ 1.5 V - well within range. Full functionality, including PG assertion and sequencing, is maintained across this input range.
TC1304-VI0EMF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 2MHz
- Voltage/Current - Output 1:
- 1.2V, 500mA
- Voltage/Current - Output 2:
- 2.5V, 300mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
TC1304-VI0EMF FAQ
1.How can I place an order for TC1304-VI0EMF through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1304-VI0EMF 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 TC1304-VI0EMF reliable?
The price and inventory of TC1304-VI0EMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1304-VI0EMF is usually 5 days.
3.What payment methods are accepted for TC1304-VI0EMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1304-VI0EMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1304-VI0EMF?
TC1304-VI0EMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1304-VI0EMF 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 TC1304-VI0EMF?
For technical support, including TC1304-VI0EMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1304-VI0EMF requirements.
6.How does Aetrix verify that TC1304-VI0EMF is sourced from the original manufacturer or authorized distributors?
All TC1304-VI0EMF 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 TC1304-VI0EMF meets industry standards.
7.What is the process for return or replacement of TC1304-VI0EMF?
All TC1304-VI0EMF units undergo pre-shipment inspection (PSI). If there is an issue with TC1304-VI0EMF, 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 TC1304-VI0EMF part is unused and in its original packaging.
Return procedure for TC1304-VI0EMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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