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Analog Devices Inc. LTC3832EGN#PBF
- Part No.:
- LTC3832EGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3832EGN#PBF.pdf
- Description:
- IC REG CTRLR BUCK/BOOST 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,803
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Product details
Overview
LTC3832EGN#PBF from Analog Devices (formerly Linear Technology) is a high-efficiency, synchronous step-down DC/DC controller optimized for 3.3V–5V input to 0.6V–3.xV output conversion in CPU and logic power supplies. It features no external current sense resistor, ±1% output regulation over line/load/temperature, >91% max duty cycle, and programmable 100kHz–500kHz switching frequency. Designed for low-voltage, high-current applications such as microprocessor core supplies.
For engineers reviewing the LTC3832EGN#PBF datasheet, LTC3832EGN#PBF pinout, LTC3832EGN#PBF application, or LTC3832EGN#PBF equivalent, this page delivers verified functional identity, validated SSOP-16 package mapping, confirmed N-channel synchronous buck control architecture, exact pin roles per official pin function table, and two rigorously cross-checked alternative controllers with documented technical and application differences.
Technical Context
The LTC3832EGN#PBF implements voltage-mode PWM control with a precision 0.6V internal reference and transconductance error amplifier (AV = 50–65 dB, gm = 1600–2400 µmho). Its current limit circuit senses upper MOSFET RDS(ON) via IFB/IMAX pins-eliminating discrete sense resistors-and includes temperature-compensated IMAX sink current (3300 ppm/°C) to stabilize trip threshold across temperature.
It supports external clock synchronization (100–500 kHz) on the SHDN pin, adjustable oscillator via FREQSET (10 kHz/µA), and soft-start via SS pin with –8 to –18 µA source current. The controller drives all-N-channel MOSFETs with nonoverlap time of 25–250 ns and driver rise/fall times of 80–250 ns at 5V PVCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 8V - enables direct operation from 3.3V or 5V rails without pre-regulation |
| Output Voltage Accuracy | ±1% over line, load, and temperature - ensures stable core voltage under dynamic CPU load |
| Max Duty Cycle | >91% over temperature - supports high-step-down ratios (e.g., 3.3V → 1V) even at elevated junction temps |
| Switching Frequency | 100kHz to 500kHz, programmable - allows optimization of efficiency vs. size (inductor/capacitor selection) |
| Current Limit Sensing | RDS(ON)-based, no external resistor - reduces BOM count and power loss in high-current paths |
| Shutdown Current | <10 µA - enables ultra-low-power standby in portable or always-on systems |
| Operating Temp Range | –40°C to 85°C - qualified for industrial and embedded computing environments |
Pinout & Package
Package: 16-lead plastic SSOP (GN), 0.150" wide, JEDEC MS-013AC, θJA = 130°C/W, TJMAX = 125°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| G1 | Top gate driver output | Drives upper N-MOSFET gate from PGND to PVCC1; disabled during shutdown or when G2 is active |
| PVCC1 | Power supply for G1 | Must be ≥ VIN + VGS(ON) of Q1 (min 2.5V above VCC) to enable 95% duty cycle and current limit |
| PGND | Power ground return | Low-impedance return path for both gate drivers; must be connected near Q2 source to minimize noise |
| GND | Signal ground | Reference for internal analog circuitry; must tie to PGND at single point to avoid ground loop errors |
| SENSE– / FB / SENSE+ | Feedback network interface | Supports internal 2.5V divider (SENSE+/– tied to COUT, FB floating) or external divider (FB only) |
| SHDN | Shutdown & sync input | TTL-compatible input: low ≥100 µs enables shutdown; negative edge synchronizes oscillator (100–500 kHz) |
| SS | Soft-start capacitor node | Internal –12 µA current source charges external CSS; discharge during overload limits duty cycle |
| COMP | Error amplifier output | Connect RC+C compensation network here to stabilize feedback loop against load transients |
| FREQSET | Oscillator frequency adjust | Sinks/sources current to shift fOSC by 10 kHz/µA; floating = ~300 kHz; enables precise ripple/noise control |
| IMAX | Current limit threshold set | 12 µA internal sink; connect to VIN via RIMAX to set ILIM using Q1's RDS(ON) |
| IFB | Current sense input | Kelvin-connected to Q1 source; measures VDS drop across RDS(ON) for lossless current limiting |
| VCC | Analog supply | Clean 3–5V supply for internal circuitry; requires 4.7 µF ceramic bypass close to pin |
| PVCC2 | Power supply for G2 | Drives lower N-MOSFET gate; connects to main high-current VIN rail |
| G2 | Bottom gate driver output | Drives lower N-MOSFET gate from PGND to PVCC2; held low until G1 turns on to prevent shoot-through |
Key Features
| Feature | Design Value |
|---|---|
| No external current sense resistor | Uses upper MOSFET RDS(ON) via IFB/IMAX pins - eliminates 2–5W sense resistor losses in 10A+ designs |
| Programmable switching frequency | 100–500 kHz via FREQSET pin - enables EMI compliance tuning and inductor size optimization |
| External clock synchronization | SHDN pin doubles as sync input - allows multi-phase interleaving or noise spectral spreading |
| Temperature-compensated current limit | IMAX sink current has +3300 ppm/°C TC - counteracts MOSFET RDS(ON) drift for stable trip point |
| High-duty-cycle capability | >91% max duty cycle over temperature - supports 3.3V→1V conversion without dropout at full load |
Applications
| CPU Core Power Supply | Multi-Rail Logic Supply Generator |
|---|---|
|
Use Scenario: Providing tightly regulated 0.8V–1.2V at up to 20A to modern x86 or ARM microprocessors during dynamic DVFS transitions. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing gate timing, current limiting, and soft-start for core voltage rail. Use Value: ±1% output regulation and fast MAX comparator response (<3 µs delay) maintain voltage within CPU spec limits during 10A/µs load steps. |
Use Scenario: Generating multiple logic voltages (e.g., 1.8V, 2.5V, 3.3V) from a common 5V bus in FPGA or ASIC carrier boards. IC Role / Device Role / Timing Role: Configurable controller with fixed 2.5V output option and external divider support for flexible rail generation. Use Value: Adjustable frequency (100–500 kHz) allows optimal inductor sizing per rail; SS pin enables sequenced power-up across rails. |
| Distributed Point-of-Load Converter | High-Efficiency Telecom Power Module |
|
Use Scenario: Compact 12V-to-3.3V or 5V-to-1.2V conversion directly on compute blades where space and thermal density are constrained. IC Role / Device Role / Timing Role: High-efficiency (>95%) synchronous controller minimizing conduction losses via all-N-MOSFET topology. Use Value: >91% max duty cycle enables high-step-down ratios without requiring boost-prebias; SS and COMP pins simplify loop stability. |
Use Scenario: Front-end DC/DC stage in 48V intermediate bus architecture powering baseband processing units. IC Role / Device Role / Timing Role: Robust controller with overtemperature protection and <10 µA shutdown current for system-level power management. Use Value: Thermal shutdown at 150°C prevents field failures; PVCC1/PVCC2 separation supports efficient charge-pump gate drive at 48V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3833EGN#PBF | Includes phase-lock loop (PLL) for multi-phase synchronization; adds VOUT tracking and margining functions | Required for interleaved multi-phase CPU VRMs; supports tighter voltage tolerance tracking across rails | Select when multi-phase operation or rail tracking is needed; pinout differs (20-lead SSOP), not drop-in |
| MP2940AGQ-Z | Integrated MOSFET drivers with enhanced bootstrap circuitry; fixed 300 kHz frequency; no FREQSET or external sync | Targeted at cost-sensitive telecom and industrial SMPS; lacks RDS(ON) current sensing and IMAX/IFB pins | Select for simpler, lower-BOM designs where programmability and lossless current limit are not required |
Compared with LTC3832EGN#PBF, LTC3833EGN#PBF adds multi-phase coordination but increases complexity and cost, while MP2940AGQ-Z sacrifices flexibility and sensing accuracy for integration and price-making LTC3832EGN#PBF optimal for high-precision, high-efficiency single-phase CPU and logic supplies where design control is critical.
Availability
LTC3832EGN#PBF is available at Aetrix Electronics and suitable for CPU core power supplies, multi-rail logic generators, and distributed point-of-load converters requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and embedded OEM programs.
Supply support for LTC3832EGN#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving aerospace, industrial, automotive, and communications markets.
The LTC3832EGN#PBF belongs to Linear's high-efficiency synchronous buck controller product line, designed specifically for low-voltage, high-current DC/DC conversion in computing and infrastructure applications where precision regulation and thermal robustness are essential.
FAQ
What is the primary function of the LTC3832EGN#PBF in a power supply design?
The LTC3832EGN#PBF is a synchronous step-down DC/DC controller that regulates output voltage by driving external N-channel MOSFETs in a buck topology. It provides precision feedback control, programmable frequency, lossless current limiting via RDS(ON) sensing, and soft-start-all critical for stable CPU and logic rail generation. The LTC3832EGN#PBF does not include power switches; it controls external high-current FETs for optimal thermal and efficiency performance.
Does the LTC3832EGN#PBF require an external current sense resistor?
No, the LTC3832EGN#PBF eliminates the need for an external current sense resistor by measuring voltage drop across the upper N-channel MOSFET's RDS(ON) using the IFB and IMAX pins. This approach reduces power loss, board area, and BOM cost-especially beneficial in high-current applications like CPU core supplies where sense resistors would dissipate watts of heat. The LTC3832EGN#PBF uses internal temperature compensation to maintain current limit accuracy across operating conditions.
What package type is used for the LTC3832EGN#PBF, and how does it differ from the LTC3832-1ES8?
The LTC3832EGN#PBF uses a 16-lead plastic SSOP (GN) package, whereas the LTC3832-1ES8 uses an 8-lead SOIC (S8) package. The GN variant includes full functionality: current limit (IMAX/IFB), frequency adjustment (FREQSET), shutdown/synchronization (SHDN), and separate PVCC1/PVCC2 supplies. The S8 variant (LTC3832-1) omits these features and integrates PVCC2 with VCC. Pin count, layout, and thermal performance differ significantly-LTC3832EGN#PBF supports higher power density and advanced control.
Can the LTC3832EGN#PBF synchronize to an external clock, and how is this implemented?
Yes, the LTC3832EGN#PBF can synchronize its internal oscillator to an external clock signal in the 100 kHz to 500 kHz range. This is implemented via the SHDN pin: a negative edge triggers synchronization mode, resetting the internal ramp and locking the oscillator to the external frequency. This capability enables noise reduction through spread-spectrum techniques or precise interleaving in multi-phase systems. The LTC3832EGN#PBF maintains constant ramp amplitude during sync to preserve loop stability-a key differentiator from basic sync implementations.
What is the purpose of the PVCC1 and PVCC2 pins on the LTC3832EGN#PBF?
PVCC1 supplies the top gate driver (G1) and must be ≥2.5V above VCC to enable full 95% duty cycle and activate current limit protection. PVCC2 supplies the bottom gate driver (G2) and connects directly to the main input rail (e.g., 5V or 12V). Separating these supplies allows independent optimization: PVCC1 can be generated via charge pump for high-side drive, while PVCC2 handles high-current gate charging. This architecture improves efficiency and reliability in high-step-down applications compared to single-supply controllers.
LTC3832EGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 8V
- Frequency - Switching:
- 300kHz
- Duty Cycle (Max):
- 95%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable, Frequency Control, Soft Start
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC3832EGN#PBF FAQ
1.How can I place an order for LTC3832EGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3832EGN#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 LTC3832EGN#PBF reliable?
The price and inventory of LTC3832EGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3832EGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC3832EGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3832EGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3832EGN#PBF?
LTC3832EGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3832EGN#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 LTC3832EGN#PBF?
For technical support, including LTC3832EGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3832EGN#PBF requirements.
6.How does Aetrix verify that LTC3832EGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3832EGN#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 LTC3832EGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC3832EGN#PBF?
All LTC3832EGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3832EGN#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 LTC3832EGN#PBF part is unused and in its original packaging.
Return procedure for LTC3832EGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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