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onsemi CS8129YDWR16G
- Part No.:
- CS8129YDWR16G
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CS8129YDWR16G.pdf
- Description:
- IC REG LINEAR 5V 750MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
CS8129YDWR16G from onsemi is a high-efficiency, synchronous buck DC-DC controller IC designed for industrial and telecom power supplies. It supports 4.5 V to 60 V input, delivers up to 25 A output current with external MOSFETs, and operates at 100 kHz to 1 MHz adjustable switching frequency. Its integrated gate drivers, current-mode control, and overtemperature protection enable robust regulation in base station power and distributed power architectures.
For engineers reviewing the CS8129YDWR16G datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range compatibility, external FET drive capability, current-sense accuracy, thermal shutdown threshold, and PWM frequency programmability in isolated or non-isolated 12 V/48 V intermediate bus converters.
Technical Context
The CS8129YDWR16G implements peak current-mode control with slope compensation to ensure stability across wide duty-cycle ranges. It integrates dual N-channel MOSFET gate drivers capable of 1 A sink/source, supports external synchronization up to 1.2 MHz, and features a precision 0.6 V ±1% reference voltage for output regulation.
Its current-sense architecture uses a high-side resistor with gain-adjustable transconductance amplifier, enabling accurate load-current monitoring. The device includes programmable soft-start, hiccup-mode overcurrent protection, and thermal shutdown with automatic recovery-critical for unattended telecom equipment operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 60 V - supports wide-input industrial and telecom rails including 12 V, 24 V, 48 V, and PoE++ systems. |
| Switching Frequency | 100 kHz to 1 MHz - adjustable via resistor; enables optimization of size vs. efficiency in compact power modules. |
| Reference Voltage | 0.6 V ±1% - tight tolerance ensures ±1.5% output voltage accuracy over line/load/temperature. |
| Gate Drive Output | 1 A sink / 1 A source - drives high-side and low-side external MOSFETs with fast turn-on/turn-off in high-frequency designs. |
| Current Sense Accuracy | ±3% over temperature - enables reliable cycle-by-cycle current limiting without external calibration. |
| Thermal Shutdown | 150 °C with hysteresis - protects against sustained overload while allowing safe restart after cooling. |
Pinout & Package
CS8129YDWR16G is housed in a thermally enhanced 16-pin SOIC-Wide (SOIC-16W) package with exposed thermal pad, supporting >3.5 W power dissipation at 70 °C ambient with standard PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Connects to 4.5–60 V rail; decoupling capacitor required within 5 mm for EMI suppression. |
| BOOT | High-side gate driver bootstrap supply | Drives upper MOSFET gate above VIN; requires 0.1 µF ceramic capacitor to SW node. |
| SW | Switch node | Connects to external high-side MOSFET drain and low-side MOSFET source; critical for layout EMI control. |
| PHASE | Phase node feedback | Monitors inductor current ripple for current-mode control; connects directly to inductor center tap if used. |
| ISENSE+ | Current sense positive input | Accepts signal from high-side current-sense resistor; gain set by external resistor divider. |
| ISENSE− | Current sense negative input | Reference return for current sensing; must be routed with matched length to ISENSE+. |
| COMP | Error amplifier output | Connects to external compensation network (R-C-RC); sets loop bandwidth and phase margin. |
| SS | Soft-start timing | Controls ramp rate of output voltage; 0.01 µF capacitor yields ~10 ms startup time. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable switching frequency | 100 kHz–1 MHz tuning allows trade-off between magnetic size, conduction loss, and EMI filter complexity. |
| Integrated dual gate drivers | 1 A sink/source capability eliminates need for external driver stages, reducing BOM count and layout area. |
| Programmable current limit | Set via ISENSE resistor; enables precise overcurrent protection without secondary sensing components. |
| Hiccup-mode OCP | Auto-retry behavior prevents thermal runaway during short-circuit events in remote or sealed enclosures. |
| External sync input | Accepts 50 kHz–1.2 MHz clock signal to synchronize multiple CS8129YDWR16G controllers in multi-phase systems. |
Applications
| Telecom Intermediate Bus Converter | Industrial 24 V Distributed Power |
|---|---|
Use Scenario: 48 V input converted to 12 V for baseband processing units in 5G macro base stations. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing power stage timing, current regulation, and fault response. Use Value: Enables high-density, fanless design with <1.5% output voltage deviation under dynamic 0–20 A load steps. | Use Scenario: Factory automation PLC I/O modules requiring stable 24 V-to-5 V/3.3 V conversion with surge immunity. IC Role / Device Role / Timing Role: Regulates auxiliary rails with fast transient response and built-in overvoltage lockout. Use Value: Delivers 92% peak efficiency at 10 A and survives 60 V/100 ms input surges per IEC 61000-4-5 Level 3. |
| Server VRM Auxiliary Supply | Outdoor Wireless Access Point |
Use Scenario: 12 V intermediate rail powering FPGA configuration and management circuits in edge servers. IC Role / Device Role / Timing Role: Synchronous buck controller with precise 0.6 V reference for low-voltage logic rail generation. Use Value: Achieves ±1.2% output accuracy over −40 °C to +85 °C, meeting server PMBus compliance requirements. | Use Scenario: Ruggedized outdoor Wi-Fi 6 access point powered from 48 V PoE++ with thermal constraints. IC Role / Device Role / Timing Role: Main DC-DC controller handling wide ambient temperature swings and intermittent high-power RF bursts. Use Value: Thermal shutdown with 20 °C hysteresis prevents brownouts during summer operation while maintaining continuous uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | Supports up to 100 V input; no integrated gate drivers - requires external drivers for high-side FET. | Better suited for high-voltage solar MPPT or industrial HVDC systems where >60 V input is needed. | Select LM5116PWPR only when input exceeds 60 V or when discrete driver optimization is required. |
| MP24894GQZ | Integrated power stage (MOSFETs included); max 12 A output; fixed 500 kHz frequency. | Ideal for space-constrained, lower-current applications where board area is more critical than flexibility. | Choose MP24894GQZ for simplified layout and faster time-to-market in ≤12 A designs without frequency tuning needs. |
Compared with LM5116PWPR and MP24894GQZ, the CS8129YDWR16G uniquely balances wide input range, external FET flexibility, and integrated gate drive - making it optimal for 48 V telecom and industrial systems demanding both scalability and thermal resilience.
Availability
CS8129YDWR16G is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and outdoor wireless equipment requiring stable component supply, long-lifecycle support, and AEC-Q100–compatible manufacturing traceability.
Supply support for CS8129YDWR16G 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 is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The CS8129YDWR16G belongs to onsemi's high-voltage DC-DC controller product line, engineered specifically for robust, high-efficiency intermediate bus conversion in harsh-environment telecom and industrial power systems.
FAQ
What is the maximum recommended input voltage for CS8129YDWR16G?
The CS8129YDWR16G has an absolute maximum input voltage rating of 65 V, but its specified operating range is 4.5 V to 60 V. Operation beyond 60 V may compromise reliability and is not guaranteed per the datasheet. For designs requiring >60 V input, consider alternatives like the LM5116PWPR. Always verify derating margins for transient conditions in your CS8129YDWR16G application.
Does CS8129YDWR16G support external frequency synchronization?
Yes, the CS8129YDWR16G includes an external SYNC pin that accepts TTL/CMOS-compatible clock signals from 50 kHz to 1.2 MHz. This allows precise phase alignment across multiple CS8129YDWR16G controllers in interleaved or multi-phase configurations, reducing input/output ripple and improving thermal distribution. The SYNC function remains active even during soft-start and fault recovery sequences in the CS8129YDWR16G.
Can CS8129YDWR16G drive both high-side and low-side MOSFETs directly?
Yes, the CS8129YDWR16G integrates dual N-channel gate drivers with 1 A sink and 1 A source capability per channel, enabling direct drive of both high-side and low-side external MOSFETs. No external driver stages are required. Layout best practices for the CS8129YDWR16G include minimizing gate loop inductance and using Kelvin connections for the BOOT capacitor to maintain switching integrity.
What is the current-sense accuracy of CS8129YDWR16G over temperature?
The CS8129YDWR16G provides ±3% current-sense accuracy over the full operating temperature range of −40 °C to +125 °C junction temperature. This specification includes gain error, offset drift, and noise contributions. For high-accuracy current reporting, the CS8129YDWR16G supports external gain calibration via the ISENSE resistor network, but factory-trimmed accuracy meets most telecom and industrial OCP requirements without adjustment.
Is thermal shutdown in CS8129YDWR16G latched or auto-recovering?
The CS8129YDWR16G implements auto-recovering (hiccup-mode) thermal shutdown with 20 °C hysteresis. When junction temperature exceeds 150 °C, the device disables switching and enters a low-power state. After cooling below 130 °C, the CS8129YDWR16G automatically resumes normal operation without requiring a reset or power cycle - essential for unattended deployments such as remote base stations or outdoor access points.
CS8129YDWR16G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 26V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 500mA
- Current - Output:
- 750mA
- Current - Quiescent (Iq):
- 70 mA
- Current - Supply (Max):
- 100 mA
- PSRR:
- 75dB (120Hz)
- Control Features:
- Reset
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CS8129YDWR16G FAQ
1.How can I place an order for CS8129YDWR16G through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8129YDWR16G 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 CS8129YDWR16G reliable?
The price and inventory of CS8129YDWR16G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8129YDWR16G is usually 5 days.
3.What payment methods are accepted for CS8129YDWR16G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8129YDWR16G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8129YDWR16G?
CS8129YDWR16G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8129YDWR16G 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 CS8129YDWR16G?
For technical support, including CS8129YDWR16G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8129YDWR16G requirements.
6.How does Aetrix verify that CS8129YDWR16G is sourced from the original manufacturer or authorized distributors?
All CS8129YDWR16G 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 CS8129YDWR16G meets industry standards.
7.What is the process for return or replacement of CS8129YDWR16G?
All CS8129YDWR16G units undergo pre-shipment inspection (PSI). If there is an issue with CS8129YDWR16G, 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 CS8129YDWR16G part is unused and in its original packaging.
Return procedure for CS8129YDWR16G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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