My Inquiry
My Account
onsemi FAN5069EMTCX
- Part No.:
- FAN5069EMTCX
- Manufacturer:
- onsemi
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
FAN5069EMTCX.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FAN5069EMTCX from onsemi (formerly Fairchild) is a dual-output power management IC integrating a synchronous buck PWM controller and an LDO controller in a single 16-pin TSSOP package. It supports input voltages from 3V to 24V, delivers PWM output from 0.8V to 15V (e.g., 1.5V VDDQ for DDR memory), and regulates LDO output from 0.8V to 3V (e.g., 1.25V VTT_GTL). Designed for PC/server motherboard peripheral rails, it features RDS(ON) current sensing, programmable 200–600 kHz switching frequency, and multi-fault protection with optional auto-restart.
For engineers reviewing the FAN5069EMTCX datasheet, pinout, applications, or equivalent options, key selection considerations include its industrial-grade temperature range (−40°C to +85°C), integrated synchronous boot diode, soft-start control via single external capacitor, shunt-regulated VCC bias (5.6 V max), and dual-regulator coordination for GTL/DDR termination and core logic supplies.
Technical Context
The FAN5069EMTCX implements summing-current-mode PWM control with external compensation for fast load transient response and design flexibility. Its current sensing uses the low-side MOSFET's RDS(ON)-a lossless, cost-effective method-while supporting optional external resistor sensing for tighter accuracy. The internal shunt regulator at VCC enables direct operation from either 5 V or 12 V supply rails.
Both regulators share a unified soft-start circuit controlled by a single external capacitor on SS pin: PWM protection activates at 1.2 V, and LDO enable occurs at 2.2 V. Adaptive shoot-through protection monitors gate-to-source voltages of both high- and low-side MOSFETs to dynamically adjust dead time, ensuring safe commutation across diverse FET selections without layout-dependent tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 24 V - Supports wide-range DC inputs including 5 V, 12 V, and 24 V system rails without external pre-regulation. |
| PWM Output Voltage Range | 0.8 V to 15 V - Configurable for DDR memory VDDQ (1.5 V), MCH VCC (1.5 V), and GTL VTT (1.25 V) via FB divider. |
| LDO Output Voltage Range | 0.8 V to 3 V - Adjustable for GTL bus termination (e.g., 1.25 V) using FBLDO feedback network. |
| Switching Frequency | 200 kHz to 600 kHz - Programmable via RT resistor; higher frequencies reduce inductor size but increase switching losses. |
| Operating Temperature | −40°C to +85°C - Industrial-grade rating ensures reliability in server, embedded, and industrial power environments. |
| VCC Shunt Regulation | 5.6 V max, 150 mA sink - Enables direct 12 V biasing with external RVCC resistor; eliminates need for separate 5 V LDO for IC bias. |
| Soft-Start Control | Single SS pin (10 µA source) - Coordinates ramp timing for both PWM and LDO; prevents inrush current and enables fault delay staging. |
Pinout & Package
Package: 16-pin TSSOP (4.4 mm × 5.0 mm, 0.65 mm pitch), lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FBLDO (Pin 1) | LDO Feedback Input | Connects to voltage divider from LDO output; regulates LDO output to internal 0.8 V reference (±1.5% over temp). |
| R(T) (Pin 2) | Oscillator Frequency Set | Resistor to GND sets nominal 200 kHz base frequency; open = 200 kHz, 56 kΩ = ~300 kHz per datasheet curve. |
| ILIM (Pin 3) | Current Limit Threshold | Resistor to GND programs cycle-by-cycle overcurrent limit; 10 µA internal source defines trip point. |
| SS (Pin 4) | Soft-Start Timing & Fault Enable | Capacitor to GND controls slew rate; 1.2 V enables PWM protection, 2.2 V enables LDO output. |
| COMP (Pin 5) | Error Amplifier Output | Compensation node for PWM feedback loop; connects to RC network between FB and GND for stability tuning. |
| FB (Pin 6) | PWM Feedback Input | Inverting input of error amplifier; regulated to 0.8 V reference for precise output voltage setting. |
| EN (Pin 7) | Enable/Reset Input | CMOS-compatible logic input; high = enable, low = shutdown; toggling resets latched faults. |
| AGND (Pin 8) | Analog Ground Reference | Low-impedance return for all internal analog circuits; must connect directly to ground plane under IC. |
| SW (Pin 9) | Switch Node | Connects to source of high-side FET and drain of low-side FET; used for RDS(ON) current sensing and adaptive dead-time monitoring. |
| HDRV (Pin 10) | High-Side Gate Driver | Drives gate of upper N-channel MOSFET; monitored for adaptive shoot-through protection. |
| BOOT (Pin 11) | Bootstrap Supply | Connects to bootstrap capacitor (CBOOT) to generate gate drive voltage above SW for high-side FET. |
| PGND (Pin 12) | Power Ground | Return path for low-side driver and power stage; separate from AGND to minimize noise coupling. |
| LDRV (Pin 13) | Low-Side Gate Driver | Drives gate of lower N-channel MOSFET; monitored for adaptive shoot-through protection. |
| R(RAMP) (Pin 14) | Voltage Feed-Forward Input | Resistor to VIN sets ramp amplitude to stabilize modulator gain across input voltage variations. |
| VCC (Pin 15) | Bias Supply Input | Internal shunt regulator maintains ≤5.6 V; sinks up to 150 mA when biased from 12 V rail. |
| GLDO (Pin 16) | LDO Gate Drive Output | Drives external P-channel MOSFET for LDO section; enabled only after SS ≥ 2.2 V. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck + LDO Combo | Single-chip solution for dual-rail systems (e.g., DDR VDDQ + VTT), reducing BOM count and PCB area vs. discrete controllers. |
| RDS(ON) Current Sensing | Eliminates sense resistor loss and cost; supports accurate current limiting with optional external resistor for tighter tolerance. |
| Unified Soft-Start | Single SS capacitor coordinates startup sequencing: PWM regulation begins before LDO enable, preventing cross-regulator interaction. |
| Adaptive Shoot-Through Protection | Monitors actual FET gate voltages-not fixed delays-to dynamically adjust dead time, enabling robust operation with varied MOSFETs. |
| Multi-Fault Protection | Integrated OVP (115% of VREF), UVP (75% of VREF), thermal shutdown (160°C), and cycle-by-cycle current limit with configurable auto-restart. |
Applications
| PC/Server Motherboard Peripherals | Power Supply for FPGA & DSP |
|---|---|
Use Scenario: Generating VDDQ (1.5 V) and VTT_GTL (1.25 V) for DDR2/DDR3 memory interfaces on server motherboards. IC Role / Device Role / Timing Role: FAN5069EMTCX acts as dual-output point-of-load controller-PWM regulates VDDQ, LDO regulates VTT-with coordinated soft-start and shared current-sense architecture. Use Value: Eliminates need for two separate controllers and reduces component count while maintaining tight regulation (<±1%) and fast transient response (<10 µs recovery). | Use Scenario: Providing clean, low-noise 1.2 V core and 2.5 V I/O rails for Xilinx Spartan-6 FPGA or TI C6000 DSP in industrial control modules. IC Role / Device Role / Timing Role: FAN5069EMTCX delivers stable core voltage via PWM and low-noise I/O voltage via LDO, leveraging internal shunt regulation for 12 V input compatibility. Use Value: Enables single-rail 12 V input design with <10 mVpp output ripple on LDO rail and <2% load regulation across 0–5 A load range. |
| Industrial Power Supplies | High-Power DC-to-DC Converters |
Use Scenario: Powering ARM-based industrial PLCs requiring −40°C to +85°C operation, isolated 3.3 V logic, and 1.8 V processor core rails. IC Role / Device Role / Timing Role: FAN5069EMTCX serves as primary non-isolated regulator stage-PWM for high-efficiency core rail, LDO for noise-sensitive logic-within compact 16-pin TSSOP footprint. Use Value: Industrial temperature grade and robust fault handling (auto-restart or latch-off) ensure continuous operation in harsh environments without derating. | Use Scenario: Serving as front-end controller in 48 V to 12 V intermediate bus converter for telecom equipment with >15 A output capability. IC Role / Device Role / Timing Role: FAN5069EMTCX controls high-current synchronous buck stage (via external 3 mΩ RDS(ON) FETs) and provides auxiliary 5 V LDO for control circuitry. Use Value: RDS(ON) sensing and programmable 600 kHz frequency allow optimized efficiency (>92% at 10 A) and minimal output filter size. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8765GQ-Z (Monolithic Power Systems) | Single-channel synchronous buck controller (no integrated LDO); requires external LDO or second controller for dual-rail support. | Not suitable for GTL termination where LDO noise rejection and fast transient response are critical; better for pure high-efficiency buck-only designs. | Select when only PWM regulation is needed and board space allows separate LDO implementation. |
| TPS51220ARUKT (Texas Instruments) | Dual-output buck controller with integrated MOSFET drivers but no LDO section; supports VR12.5/IMVP-6 compliance and dynamic VID. | Targeted at CPU/GPU VRMs-not DDR termination-lacking FBLDO pin and LDO gate drive (GLDO) functionality. | Choose for notebook/desktop CPU core power where VID interface and phase interleaving are required. |
Compared with MP8765GQ-Z and TPS51220ARUKT, the FAN5069EMTCX uniquely integrates both PWM and LDO control in one IC with shared soft-start, making it the only option among the three capable of native GTL/DDR termination without external components or secondary ICs.
Availability
FAN5069EMTCX is available at Aetrix Electronics and suitable for PC/server motherboard peripherals, FPGA/DSP power supplies, and industrial embedded systems requiring stable component supply despite its discontinued status for new designs.
Supply support for FAN5069EMTCX 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
onsemi (formerly Fairchild Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The FAN5069EMTCX belongs to onsemi's legacy power management portfolio designed specifically for high-density, multi-rail point-of-load conversion in computing infrastructure-emphasizing integration, thermal robustness, and DDR/GTL compliance.
FAQ
What is the operating temperature range of the FAN5069EMTCX?
The FAN5069EMTCX is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The extended range ensures reliable performance in server chassis, industrial PLCs, and outdoor embedded systems where ambient temperatures exceed commercial-grade limits. All electrical characteristics-including reference voltage accuracy, current limit threshold, and gate drive strength-are guaranteed across this full range.
Does the FAN5069EMTCX support 12 V input for VCC biasing?
Yes, the FAN5069EMTCX supports 12 V input for VCC biasing via its internal shunt regulator, which sinks up to 150 mA to maintain VCC ≤5.6 V. An external resistor (RVCC) must be placed between the 12 V supply and the VCC pin, sized per Equation 1 in the datasheet to manage power dissipation and minimize IC self-heating. This eliminates the need for a separate 5 V LDO, simplifying power tree design for systems with existing 12 V rails.
How does the FAN5069EMTCX implement current limiting on the PWM output?
The FAN5069EMTCX implements cycle-by-cycle current limiting using RDS(ON) sensing of the low-side MOSFET, with an internal 10 µA current source setting the trip threshold at ILIM pin. When the sensed voltage exceeds this threshold, the PWM skips pulses; 16 consecutive trips trigger a fault latch. For improved accuracy, an external sense resistor can replace RDS(ON) sensing. The datasheet provides Equation 5 to calculate RILIM based on target IMAX, MOSFET RDS(ON), input/output voltages, and switching frequency.
Can the FAN5069EMTCX be used for DDR memory termination (VTT)?
Yes, the FAN5069EMTCX is explicitly designed for DDR memory termination applications such as VTT_GTL (1.25 V). Its integrated LDO controller-configured via FBLDO feedback and driven by GLDO pin-provides low-noise, fast-transient response regulation ideal for GTL bus termination. The datasheet lists "VTT_GTL (1.25 V)" as a primary application, and typical performance curves (Figures 7–8) validate <2 µs recovery from 0–5 A load steps with <10 mV undershoot.
Is the FAN5069EMTCX pin-compatible with the commercial-grade FAN5069MTCX?
Yes, the FAN5069EMTCX and FAN5069MTCX share identical pinout, package (16-pin TSSOP), and electrical functionality-the only difference is operating temperature grade: FAN5069EMTCX is rated for −40°C to +85°C (industrial), while FAN5069MTCX is rated for −10°C to +85°C (commercial). Both use the same reference voltages, protection thresholds, and compensation schemes, allowing drop-in replacement in thermally demanding environments without layout changes.
FAN5069EMTCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Topology:
- Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 200kHz
- Voltage/Current - Output 1:
- Controller
- Voltage/Current - Output 2:
- Controller
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
FAN5069EMTCX FAQ
1.How can I place an order for FAN5069EMTCX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN5069EMTCX 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 FAN5069EMTCX reliable?
The price and inventory of FAN5069EMTCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN5069EMTCX is usually 5 days.
3.What payment methods are accepted for FAN5069EMTCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN5069EMTCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN5069EMTCX?
FAN5069EMTCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN5069EMTCX 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 FAN5069EMTCX?
For technical support, including FAN5069EMTCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN5069EMTCX requirements.
6.How does Aetrix verify that FAN5069EMTCX is sourced from the original manufacturer or authorized distributors?
All FAN5069EMTCX 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 FAN5069EMTCX meets industry standards.
7.What is the process for return or replacement of FAN5069EMTCX?
All FAN5069EMTCX units undergo pre-shipment inspection (PSI). If there is an issue with FAN5069EMTCX, 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 FAN5069EMTCX part is unused and in its original packaging.
Return procedure for FAN5069EMTCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FAN5069EMTCX Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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…
