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Analog Devices Inc. LTM4709EY#PBF
- Part No.:
- LTM4709EY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Converters
- Package:
- 98-FBGA Module
- Datasheet:
-
LTM4709EY#PBF.pdf
- Description:
- LINEAR REG. MOD W/ TRI 3A OUTPUT
- Quantity:
- Payment:
- Shipping:
Inventory:4,810
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Product details
Overview
LTM4709EY#PBF from Analog Devices is a triple-output, 3A per channel ultralow-noise µModule linear regulator with configurable digital output array, 45mV typical dropout at 3A, 1.3μVRMS (10Hz–100kHz) output noise, and 51dB PSRR at 1MHz - designed for post-regulation of FPGA core, RF transceiver, and high-precision ADC/DAC power rails.
For engineers reviewing the LTM4709EY#PBF datasheet, LTM4709EY#PBF pinout, LTM4709EY#PBF application, or LTM4709EY#PBF equivalent, key selection criteria include triple-channel voltage configurability (0.5V–4.2V), ±1.5% output regulation over line/load/temperature, precision current monitoring (±2.4% at 3A), and 6mm × 12mm BGA package thermal performance (θJCbottom = 3°C/W).
Technical Context
The LTM4709EY#PBF integrates three independent low-dropout linear regulators with internal pass MOSFETs, reference circuitry, compensation, and filtering capacitors in a single BGA module. Each channel features digitally programmable output voltage via tri-state VOx0/VOx1/VOx2 pins and supports Kelvin sensing (VOUTSx) for point-of-load regulation.
It employs an N-channel source-follower architecture enabling ultrafast transient response with only 10μF ceramic output capacitance, while VIOC1 provides closed-loop control of upstream buck converters to maintain optimal VIN–VOUT headroom for efficiency and PSRR preservation - a function exclusive to Channel 1 in multi-channel operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A per channel × 3 channels; supports parallel operation up to 9A total with shared bias and enable control. |
| Output Voltage Range | 0.5V–4.2V digitally selectable: 50mV steps (0.5–1.2V), 100mV steps (1.2–1.8V), discrete levels at 2V/2.5V/3V/3.3V/4.2V. |
| RMS Output Noise | 1.3μVRMS (10Hz–100kHz); achieved without external VREF bypass capacitor - reduces BOM count and layout complexity. |
| PSRR @ 1MHz | 51dB at 3A load and 300mV VIN–VOUT differential; enables effective rejection of switching ripple from upstream DC/DC converters. |
| Dropout Voltage | 45mV typical at 3A (VOUT = 1.2V); enables operation with minimal input–output headroom, critical for low-voltage core supplies. |
| Current Monitor Accuracy | ±2.4% at 3A per channel; IMONx outputs current proportional to IOUT/3000, supporting real-time energy management and fault detection. |
| Thermal Performance | θJCbottom = 3°C/W; junction temperature rise <70°C at 9A total output and 25°C ambient - validated on demo board per JESD-51. |
Pinout & Package
The LTM4709EY#PBF is housed in a 98-pin BGA package measuring 6mm × 12mm × 1.92mm with 0.8mm ball pitch and SAC305 RoHS-compliant finish. Thermal performance is optimized via bottom-side thermal pad (GND balls) and top-side copper exposure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1/VIN2/VIN3 | Input supply for each channel | Accepts 0.6V–5.5V; requires ≥4.7μF local ceramic decoupling per channel to suppress input impedance peaks. |
| VOUT1/VOUT2/VOUT3 | Main regulated output terminals | Deliver up to 3A each; require ≥10μF X5R/X7R ceramic output capacitance per channel for stability and transient response. |
| VOUTS1/VOUTS2/VOUTS3 | Kelvin sense inputs | Connect directly to load for precise point-of-load regulation; eliminates PCB trace IR drop error in sensitive applications. |
| VO10/VO11/VO12 (etc.) | Digital output voltage select | Three-state logic (Low/Hi-Z/High) sets nominal VOUT per channel per Table 1; enables dynamic reconfiguration without external DAC. |
| IMON1/IMON2/IMON3 | Current monitor output | Sources IOUT/3000 current; termination to GND with resistor yields voltage proportional to load current for telemetry or limiting. |
| VIOC1 | Input-to-output voltage control | Drives upstream buck feedback node to maintain constant (VIN–VOUT); exclusive to Channel 1 - enables adaptive headroom optimization. |
| EN1/EN2/EN3 | Channel enable inputs | Active-high logic; pull to BIASn if unused; supports independent sequencing or simultaneous turn-on of all three channels. |
| PG1/PG2/PG3 | Open-drain power good flags | Assert low on VOUT <93% nominal (rising), <90% (falling), BIAS UVLO, or Tj >168°C; internally pulled up via PGRx resistors. |
Key Features
| Feature | Design Value |
|---|---|
| Triple 3A configurable output array | Enables single-package power delivery to multi-rail SoCs/FPGAs with independent voltage programming per rail - eliminates discrete LDO count and layout mismatch. |
| Ultralow 1.3μVRMS noise (10Hz–100kHz) | Meets stringent spectral purity requirements for RF PLLs, VCOs, and high-resolution ADC/DAC analog supplies without added filtering. |
| 51dB PSRR at 1MHz | Rejects high-frequency switching noise from upstream DC/DC converters, preserving signal integrity in mixed-signal systems. |
| VIOC1 adaptive headroom control | Automatically adjusts upstream buck output to maintain optimal VIN–VOUT differential - maximizes efficiency while sustaining PSRR and thermal margin. |
| ±1.5% output regulation over line/load/temp | Guarantees stable core voltage under varying processor load, input sag, and ambient conditions - critical for deterministic digital timing. |
| Integrated 2.2μF VREF bypass capacitor | Eliminates need for external reference capacitor, reducing component count and PCB area while ensuring soft-start and low-noise reference stability. |
Applications
| RF Power Supplies | FPGA & Microprocessor Core |
|---|---|
Use Scenario: Powering PLLs, VCOs, LNAs, and PAs in 5G mmWave transceivers where phase noise and spurious emissions are tightly constrained. IC Role / Device Role / Timing Role: Ultra-low-noise post-regulator delivering clean 0.8V–1.2V supplies to RF synthesizers and amplifiers. Use Value: 1.3μVRMS noise and 51dB PSRR at 1MHz prevent supply-induced phase jitter and adjacent-channel interference. | Use Scenario: Supplying core, I/O, and auxiliary rails of high-end FPGAs (e.g., Xilinx Versal, Intel Agilex) during rapid load transients from logic switching. IC Role / Device Role / Timing Role: Triple-channel fast-response LDO providing independently configured voltages (e.g., 0.85V core, 1.0V memory, 1.8V I/O). Use Value: Ultrafast transient response with only 10μF ceramic output caps meets sub-100ns load step requirements without bulk capacitance. |
| High-Speed Data Converters | Medical Instrumentation |
Use Scenario: Biasing high-speed, high-resolution ADCs/DACs (e.g., 16-bit+ @ >100MSPS) in test equipment and radar receivers. IC Role / Device Role / Timing Role: Low-noise, low-drift analog supply regulator for converter reference and analog front-end stages. Use Value: ±1.5% regulation and 1.3μVRMS noise ensure ENOB retention and minimize DNL errors across temperature and load. | Use Scenario: Powering low-noise amplifiers, sensor interfaces, and precision analog front-ends in portable ultrasound and EEG systems. IC Role / Device Role / Timing Role: Medical-grade linear regulator delivering stable, EMI-immune 1.2V–3.3V rails in battery-powered diagnostic devices. Use Value: Integrated fault protection (UVLO, overtemp, overcurrent) and 150°C-rated H-grade variant support Class II safety-critical operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM4700IY#PBF | Single 10A output; no digital voltage selection; fixed 0.6V–3.3V via external resistor; higher RMS noise (2.2μVRMS). | Best for high-current single-rail applications (e.g., GPU core) where multi-voltage flexibility is unnecessary. | Select LTM4700IY#PBF when total current demand exceeds 9A and rail count is ≤1 - avoids channel paralleling complexity. |
| LTC3372EFE#PBF | Octal 1A LDOs in 40-pin QFN; programmable via I²C; lower PSRR (40dB @ 1MHz); larger footprint (7mm × 7mm). | Suitable for systems requiring >3 rails with fine-grained sequencing and telemetry, but not ultralow-noise RF rails. | Choose LTC3372EFE#PBF for I²C-configurable multi-rail systems with moderate noise specs and need for per-rail diagnostics. |
Compared with LTM4700IY#PBF and LTC3372EFE#PBF, the LTM4709EY#PBF uniquely delivers triple 3A outputs with digital voltage selection, industry-leading 1.3μVRMS noise, and integrated VIOC headroom control - making it optimal for compact, high-performance multi-rail RF and FPGA power systems where noise, size, and adaptive efficiency are critical.
Availability
LTM4709EY#PBF is available at Aetrix Electronics and suitable for RF communication infrastructure, high-speed data acquisition systems, and FPGA-based edge AI accelerators requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for LTM4709EY#PBF 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTM4709EY#PBF belongs to Analog Devices' µModule regulator family - engineered for high-density, low-noise, and ultrafast transient power delivery in space-constrained, thermally demanding applications such as advanced computing and wireless infrastructure.
FAQ
What is the maximum supported output voltage for LTM4709EY#PBF and how is it selected?
The LTM4709EY#PBF supports output voltages from 0.5V to 4.2V per channel. Selection is performed digitally using three tri-state pins per channel (VOx0/VOx1/VOx2), where logic states (Low/Hi-Z/High) define a 3-bit code per Table 1 in the datasheet. Discrete levels include 2V, 2.5V, 3V, 3.3V, and 4.2V; intermediate values use 50mV or 100mV increments depending on range. The LTM4709EY#PBF does not support analog voltage setting or external feedback resistors.
Does LTM4709EY#PBF require external capacitors for stable operation?
Yes - the LTM4709EY#PBF requires minimum 10μF X5R/X7R ceramic output capacitance per channel (VOUTx to GND) and ≥4.7μF ceramic input capacitance per VINx for stability and optimal transient response. While internal 2.2μF VREF bypass capacitors eliminate the need for external reference caps, COUT and CIN must be placed close to respective pins per layout guidelines. The LTM4709EY#PBF is not stable with tantalum or electrolytic capacitors alone.
How does the VIOC1 pin function in LTM4709EY#PBF and which channels support it?
The VIOC1 pin on the LTM4709EY#PBF enables closed-loop control of an upstream buck converter to maintain a constant (VIN–VOUT) differential - optimizing efficiency while preserving PSRR. It outputs a voltage equal to (VIN–VOUT) + 800mV and connects directly to the buck's feedback (VFB) pin. This function is available only on Channel 1; Channels 2 and 3 lack VIOC capability. The LTM4709EY#PBF datasheet specifies that VIOC1 must not be used for Channels 2 or 3.
What is the accuracy and operating range of the current monitor in LTM4709EY#PBF?
The LTM4709EY#PBF provides ±2.4% current monitor accuracy at full 3A load per channel, with IMONx pins sourcing IOUT/3000 current. At 3A, this yields ~1mA output; at 1A, ~333μA. The monitor operates across the full –40°C to 125°C junction temperature range and supports current limiting by terminating IMONx to GND with a resistor (e.g., 1.5kΩ sets 2A limit). The LTM4709EY#PBF integrates 909Ω resistors between IMONx and IMONRx pins for factory-set 3.3A limiting when IMONRx is grounded.
Can multiple LTM4709EY#PBF units be paralleled for higher current, and what design considerations apply?
Yes - multiple LTM4709EY#PBF units can be paralleled to deliver >9A total current. Key requirements include tying all BIAS pins together, synchronizing ENx signals, connecting all VIOC1 pins to the same upstream buck VFB node (if used), and matching output voltages within ±1% to ensure current sharing. The LTM4709EY#PBF datasheet confirms parallel operation is supported, but recommends Kelvin sensing (VOUTSx) and careful thermal management due to cumulative power dissipation.
LTM4709EY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LTM®, uModule®
- Package/Case:
- 98-FBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 3
- Voltage - Input (Min):
- 0.6V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output 1:
- 0.5 ~ 4.2V
- Voltage - Output 2:
- 0.5 ~ 4.2V
- Voltage - Output 3:
- 0.5 ~ 4.2V
- Voltage - Output 4:
- -
- Current - Output (Max):
- 3A, 3A, 3A
- Power (Watts):
- 38 W
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- Adjustable Output
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 98-BGA (6x12)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
LTM4709EY#PBF FAQ
1.How can I place an order for LTM4709EY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM4709EY#PBF 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 LTM4709EY#PBF reliable?
The price and inventory of LTM4709EY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM4709EY#PBF is usually 5 days.
3.What payment methods are accepted for LTM4709EY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM4709EY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM4709EY#PBF?
LTM4709EY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM4709EY#PBF 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 LTM4709EY#PBF?
For technical support, including LTM4709EY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM4709EY#PBF requirements.
6.How does Aetrix verify that LTM4709EY#PBF is sourced from the original manufacturer or authorized distributors?
All LTM4709EY#PBF 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 LTM4709EY#PBF meets industry standards.
7.What is the process for return or replacement of LTM4709EY#PBF?
All LTM4709EY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM4709EY#PBF, 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 LTM4709EY#PBF part is unused and in its original packaging.
Return procedure for LTM4709EY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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