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Microchip Technology TC1313-ZI0EUN
- Part No.:
- TC1313-ZI0EUN
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1313-ZI0EUN.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,624
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Product details
Overview
TC1313-ZI0EUN 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) in a single 10-pin DFN package. It delivers 1.8 V @ 500 mA (buck) and 3.3 V @ 300 mA (LDO) with 2.0 MHz fixed-frequency PWM operation, 57 µA total quiescent current, and -40°C to +125°C junction temperature range - optimized for battery-powered portable computing and medical instrumentation.
For engineers reviewing the TC1313-ZI0EUN datasheet, TC1313-ZI0EUN pinout, TC1313-ZI0EUN application, or TC1313-ZI0EUN equivalent, key selection criteria include independent shutdown control per output, internal compensation eliminating external loop components, automatic PWM-to-PFM mode transition for light-load efficiency, 137 mV LDO dropout at 200 mA, and UVLO/overtemperature/short-circuit protection.
Technical Context
The TC1313-ZI0EUN implements a current-mode synchronous buck regulator with integrated P-channel and N-channel MOSFETs (RDS(on) = 450 mΩ each), operating at 2.0 MHz (±20%) under heavy load and transitioning automatically to PFM mode below ~30 mA load to maintain ultra-low IQ. Its LDO uses a PMOS pass device with 137 mV typical dropout at 200 mA and supports only fixed-output voltages (1.5V/1.8V/2.5V/3.3V).
Both regulators share common input rails (VIN1/VIN2 tied), feature independent logic-level shutdown inputs (SHDN1/SHDN2), and rely on separate ground paths: AGND for analog/feedback circuitry and PGND for high-current switching return. The device integrates undervoltage lockout (2.55 V nominal, 200 mV hysteresis), thermal shutdown (165°C, 10°C hysteresis), and overcurrent protection on both outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output 1 Type | Synchronous buck regulator: delivers up to 500 mA with adjustable (0.8–4.5 V) or fixed (0.8/1.2/1.5/1.8/2.5/3.3 V) output; internally compensated. |
| Output 2 Type | Fixed-output LDO: delivers up to 300 mA at 1.5/1.8/2.5/3.3 V; requires only 1 µF ceramic output capacitor. |
| Quiescent Current | 57 µA typical total device IQ enables >100-hour standby in USB-powered devices without compromising regulation. |
| Switching Frequency | 2.0 MHz fixed PWM frequency minimizes inductor size (4.7 µH typical) and output ripple (<8 mVPP) while supporting compact PCB layout. |
| LDO Dropout Voltage | 137 mV typical at 200 mA allows operation with minimal VIN–VOUT differential, reducing power loss in low-voltage bias rails. |
| Protection Features | Integrated UVLO (2.55 V ±150 mV), thermal shutdown (165°C), overcurrent, and short-circuit protection eliminate need for discrete fault-management circuitry. |
| Operating Temperature | -40°C to +125°C junction range supports deployment in automotive cabin, industrial handheld, and medical-grade portable equipment. |
Pinout & Package
TC1313-ZI0EUN is housed in a 3×3 mm, 10-lead DFN package with exposed thermal pad (EP), optimized for thermal performance on 4-layer PCBs (θJA = 41°C/W). Pin functions are electrically identical between DFN and MSOP variants; this part uses the DFN variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown control input | Active-high logic input (>45% VIN enables LDO; <15% VIN disables it - no external pull-up required). |
| 2 (VIN2) | LDO input supply | Accepts 2.7–5.5 V; must be tied directly to VIN1 with minimal trace length to minimize noise coupling into LDO path. |
| 3 (VOUT2) | LDO regulated output | Delivers fixed voltage (e.g., 3.3 V); requires ≥1 µF ceramic capacitor to AGND for stability and transient response. |
| 4 (NC) | No-connect terminal | Not bonded internally; must remain unconnected and un-routed on PCB to avoid parasitic coupling. |
| 5 (AGND) | Analog reference ground | Reference node for feedback divider and error amplifier; must connect to quiet analog ground plane, separate from PGND. |
| 6 (VFB/VOUT1) | Buck feedback or output sense | For adjustable versions: connects to resistor divider midpoint; for fixed versions: connects directly to VOUT1 node. |
| 7 (SHDN1) | Buck shutdown control input | Active-high logic input identical in threshold to SHDN2; enables independent enable/disable of buck stage. |
| 8 (VIN1) | Buck input supply | Primary input for buck stage (2.7–5.5 V); shares same source as VIN2 but routed separately before tie-point. |
| 9 (LX) | Switch node | High-slew-rate connection to buck inductor; requires shortest possible trace and local PGND pour to minimize EMI. |
| 10 (PGND) | Power ground return | Return path for buck switching current; must be low-inductance, low-loop-area connection to inductor and input capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-output shutdown | SHDN1 and SHDN2 allow sequenced power-up/down or selective rail disable - critical for low-power sleep modes in PDAs and medical instruments. |
| Internally compensated buck regulator | Eliminates need for external compensation network (e.g., RC across FB), reducing BOM count and layout sensitivity in space-constrained designs. |
| Automatic PWM-to-PFM mode transition | Seamlessly shifts from 2.0 MHz PWM (high efficiency at >80 mA) to burst-mode PFM (<38 µA IQ at light load), extending battery life without firmware intervention. |
| Low-noise LDO with 1 µF capacitor | Stable with minimal 1 µF ceramic output cap - reduces board area by >50% vs. traditional LDOs requiring ≥10 µF tantalum. |
| Thermal and fault protection | Integrated thermal shutdown (165°C), UVLO (2.55 V), and overcurrent detection prevent damage during input brownout, overload, or poor heatsinking. |
Applications
| Portable Medical Instrumentation | USB-Powered Peripheral |
|---|---|
|
Use Scenario: Handheld blood glucose meter powered via USB 5 V input, requiring isolated 3.3 V for MCU and 1.8 V for sensor interface. IC Role / Device Role / Timing Role: TC1313-ZI0EUN provides dual-rail power: buck generates 1.8 V @ 500 mA for low-noise analog front-end; LDO supplies clean 3.3 V @ 300 mA for digital logic. Use Value: 57 µA total IQ extends single-charge battery life beyond 120 hours; 137 mV LDO dropout enables full USB 5 V → 3.3 V conversion with margin. |
Use Scenario: Compact USB-C audio adapter needing 1.2 V core voltage for DAC and 3.3 V I/O rail for USB PHY interface. IC Role / Device Role / Timing Role: TC1313-ZI0EUN serves as primary power source: buck delivers 1.2 V @ 500 mA to DAC core; LDO supplies regulated 3.3 V @ 300 mA to USB transceiver. Use Value: 2.0 MHz switching frequency permits use of tiny 4.7 µH inductor; internal compensation avoids tuning delays during design validation. |
| Industrial Handheld Terminal | Ultra-Thin Tablet Subsystem |
|
Use Scenario: Ruggedized barcode scanner operating from 3.6 V Li-ion battery, requiring 1.5 V for image sensor and 2.5 V for display driver. IC Role / Device Role / Timing Role: TC1313-ZI0EUN replaces two discrete regulators: buck supplies 1.5 V @ 500 mA to CMOS sensor array; LDO delivers 2.5 V @ 300 mA to TFT gate driver. Use Value: -40°C to +125°C rating ensures reliable startup in cold warehouses and sustained operation near hot motors; UVLO prevents erratic behavior during battery sag. |
Use Scenario: Thin tablet subsystem where height budget limits inductor profile, demanding minimal solution footprint for SoC core and memory I/O rails. IC Role / Device Role / Timing Role: TC1313-ZI0EUN consolidates power delivery: buck generates 0.8 V @ 500 mA for ARM Cortex-A core; LDO provides 1.8 V @ 300 mA for LPDDR interface. Use Value: 3×3 mm DFN package with EP reduces total regulator footprint by 40% vs. dual discrete solutions; PGND/AGND separation maintains signal integrity in high-speed memory buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBT | Triple-output (2 buck + 1 LDO), higher IQ (85 µA), 2.25 MHz switching, QFN-24 package (5×5 mm) | Supports three independent rails; larger footprint and higher quiescent current reduce suitability for ultra-thin USB devices | Choose when third regulated rail (e.g., 1.2 V for GPU) is required and board space permits larger package. |
| RT8059ZSP | Dual buck-only (no LDO), 600 mA/600 mA, 3 MHz, WDFN-10 (3×3 mm), no independent shutdown | Lacks LDO stage - cannot replace TC1313-ZI0EUN's low-noise auxiliary rail; requires external LDO for mixed-signal biasing | Use only if both rails are switching-tolerant and system already includes discrete LDO for noise-sensitive peripherals. |
Compared with TPS65023BRSBT and RT8059ZSP, TC1313-ZI0EUN uniquely balances ultra-low IQ (57 µA), integrated LDO noise suppression, and compact 3×3 mm DFN - making it optimal for space- and battery-life-constrained dual-rail systems where one rail demands linear-regulator cleanliness.
Availability
TC1313-ZI0EUN is available at Aetrix Electronics and suitable for cellular phones, portable medical instrumentation, and USB-powered peripherals requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for TC1313-ZI0EUN 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 manufacturer specializing in microcontrollers, analog devices, and power management ICs, with broad industrial and automotive qualification coverage.
The TC1313 product line was designed specifically for cost-sensitive, space-constrained portable electronics requiring dual independent voltage rails - combining high-efficiency switching with low-noise linear regulation in a single monolithic IC.
FAQ
What output voltage options does TC1313-ZI0EUN support for its buck and LDO stages?
TC1313-ZI0EUN supports adjustable buck output from 0.8 V to 4.5 V (via external resistor divider on VFB/VOUT1) or factory-fixed values of 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The LDO stage offers only fixed outputs: 1.5 V, 1.8 V, 2.5 V, or 3.3 V - no adjustable option. The specific configuration of TC1313-ZI0EUN is fixed-output for both stages, with VOUT1 = 1.8 V and VOUT2 = 3.3 V as marked in Microchip's ordering matrix.
Can TC1313-ZI0EUN operate with separate input sources for VIN1 and VIN2?
No - TC1313-ZI0EUN requires VIN1 and VIN2 to be tied together externally with short, low-inductance traces. The datasheet explicitly states "VIN1 and VIN2 are supplied by the same input source" (Note 8, DS21974B-page 5) and warns that routing them separately degrades noise rejection and may cause instability. Using independent sources violates the device's internal biasing architecture and is not supported.
What is the minimum output capacitor required for stable operation of TC1313-ZI0EUN's LDO stage?
The LDO stage of TC1313-ZI0EUN requires a minimum 1 µF ceramic capacitor connected between VOUT2 and AGND for guaranteed stability across temperature and load. This value is specified in the "Typical Application Circuits" (DS21974B-page 3) and confirmed in Section 4.3 ("Low-Dropout Regulator") - using smaller or non-ceramic capacitors risks oscillation or degraded transient response.
Does TC1313-ZI0EUN support 100% duty cycle operation for the buck regulator?
Yes - TC1313-ZI0EUN's synchronous buck regulator supports 100% duty cycle operation, enabling VOUT1 to approach VIN1 under light loads or low input conditions. This capability is explicitly stated in Section 4.2 ("Synchronous Buck Regulator") and allows efficient operation down to VIN1 = VOUT1 + dropout, critical for Li-ion battery discharge profiles where input voltage drops to 2.7 V.
How does TC1313-ZI0EUN handle thermal overload, and what is the shutdown threshold?
TC1313-ZI0EUN incorporates thermal shutdown protection that activates at a junction temperature of 165°C (typical), with 10°C hysteresis to prevent cycling. When triggered, both buck and LDO outputs shut down simultaneously until junction temperature falls below 155°C. This behavior is documented in the "Shutdown/UVLO/Thermal Shutdown Characteristics" table (DS21974B-page 5) and applies regardless of individual output loading or shutdown pin states.
TC1313-ZI0EUN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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:
- Adj, 500mA
- Voltage/Current - Output 2:
- 2.5V, 300mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
TC1313-ZI0EUN FAQ
1.How can I place an order for TC1313-ZI0EUN through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-ZI0EUN 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 TC1313-ZI0EUN reliable?
The price and inventory of TC1313-ZI0EUN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-ZI0EUN is usually 5 days.
3.What payment methods are accepted for TC1313-ZI0EUN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-ZI0EUN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-ZI0EUN?
TC1313-ZI0EUN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-ZI0EUN 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 TC1313-ZI0EUN?
For technical support, including TC1313-ZI0EUN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-ZI0EUN requirements.
6.How does Aetrix verify that TC1313-ZI0EUN is sourced from the original manufacturer or authorized distributors?
All TC1313-ZI0EUN 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 TC1313-ZI0EUN meets industry standards.
7.What is the process for return or replacement of TC1313-ZI0EUN?
All TC1313-ZI0EUN units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-ZI0EUN, 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 TC1313-ZI0EUN part is unused and in its original packaging.
Return procedure for TC1313-ZI0EUN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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