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Analog Devices Inc./Maxim Integrated MAX16961RAUEA/V+T
- Part No.:
- MAX16961RAUEA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16961RAUEA/V+T.pdf
- Description:
- IC REG BUCK ADJ 3A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,963
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Product details
Overview
MAX16961RAUEA/V+T from Maxim Integrated is a 3A, 2.2MHz synchronous step-down DC-DC converter designed for automotive point-of-load regulation. It operates from 2.7V to 5.5V input, delivers 0.8V–3.6V adjustable output, achieves ±3% feedback accuracy, features integrated low-RDS(ON) switches, and includes open-drain power-good (PG) with 16ms delay - used in infotainment power rails requiring stable 1.2V/1.8V/3.3V supplies.
For engineers reviewing the MAX16961RAUEA/V+T datasheet, MAX16961RAUEA/V+T pinout, MAX16961RAUEA/V+T application, or MAX16961RAUEA/V+T equivalent, key selection considerations include its 2.2MHz fixed-frequency PWM mode, 26µA skip-mode quiescent current, -40°C to +125°C automotive qualification, spread-spectrum disable status (per Selector Guide), and TSSOP-EP package thermal performance (RθJA = 38.3°C/W).
Technical Context
The MAX16961RAUEA/V+T implements a peak-current-mode synchronous buck controller with dual LX outputs (LX1/LX2 paralleled for 4A RMS capability) and factory-configured SYNC-as-input operation. Its internal 800mV reference feeds an error amplifier driving a PWM comparator with slope compensation, enabling stable regulation across 0.8V–3.6V via external resistive divider on OUTS.
It integrates overtemperature shutdown at +165°C (15°C hysteresis), cycle-by-cycle overcurrent protection with 3.9A–6.3A high-side current limit, and soft-start with fixed 8ms ramp. The device supports forced-PWM (via PWM pin high) or skip-mode (PWM pin low) operation, with spread-spectrum disabled per RAUE option suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports direct connection to automotive 3.3V/5V rails without pre-regulation. |
| Output Voltage Range | 0.8V to 3.6V adjustable - set via external resistor divider on OUTS pin; no preset voltage. |
| Max Output Current | 3.3A - sustained delivery under worst-case thermal conditions (TA = +70°C, derated). |
| Switching Frequency | 2.2MHz (±10%) - enables use of all-ceramic output capacitors and compact 0.47µH inductors. |
| Feedback Accuracy | ±3% over load/line/temp - ensures tight regulation for sensitive SoC core or I/O supply domains. |
| Quiescent Current | 26µA in skip mode - minimizes standby power loss in always-on automotive modules. |
| Shutdown Current | 1µA - enables deep sleep states without battery drain in telematics or ADAS ECUs. |
| Power-Good Delay | 16ms - provides deterministic system reset timing after output stabilization. |
Pinout & Package
MAX16961RAUEA/V+T is packaged in a thermally enhanced 16-pin TSSOP-EP (U16E+3) with exposed pad (EP) soldered to PCB ground plane for optimal thermal dissipation (RθJC = 3°C/W). Pin count and layout match JEDEC MO-153 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11, 15, 16 | GND | System ground reference; multiple pins reduce impedance for analog and power return paths. |
| 2 | PGND2 | Power ground for second switch node (LX2); must be routed separately from signal GND to minimize noise coupling. |
| 3 | PGND1 | Power ground for first switch node (LX1); forms low-inductance loop with PV1 and LX1. |
| 4 | LX1 | High-side/low-side switch node 1; paralleled with LX2 to handle up to 4A RMS current. |
| 5 | PV1 | Main input supply (2.7V–5.5V); requires ≥4.7µF ceramic bypass to PGND1 close to pin. |
| 6 | EN | Enable control with 2.4V logic-high threshold; internal 100kΩ pulldown ensures default-off state. |
| 7 | OUTS | Feedback input for adjustable output; connects to resistor divider midpoint - sensitive to noise, must be isolated from LX nodes. |
| 8 | PG | Open-drain power-good output; asserts low when VOUT deviates >8% below or >10% above nominal; requires 20kΩ pullup. |
| 10 | PWM | Mode control: high = forced-PWM (fixed 2.2MHz), low = skip mode (light-load efficiency optimization). |
| 12 | PV | Internal bias supply input; bypassed with ≥1µF ceramic + 10Ω RC filter to suppress switching noise. |
| 13 | PV2 | Secondary input supply; tied to PV1 in standard configuration; bypassed with ≥4.7µF ceramic to PGND2. |
| 14 | SYNC | Factory-configured as SYNC input (1.7–2.4MHz range); enables system-level clock synchronization for EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| 2.2MHz fixed-frequency operation | Enables use of small 0.47µH inductors and all-ceramic output caps - reduces solution size by >40% vs. 500kHz converters. |
| Integrated 34mΩ/25mΩ pMOS/nMOS switches | Eliminates external MOSFETs and gate drivers - simplifies layout and improves full-load efficiency (>92% at 3A, 5V→3.3V). |
| 8ms internal soft-start | Controls inrush current during power-up - prevents input rail collapse and avoids false PG assertion. |
| 16ms programmable PG delay | Ensures stable output before host processor release - eliminates need for external timing components in automotive boot sequences. |
| Overtemperature shutdown (165°C) | Protects against thermal runaway in sealed enclosures - auto-recovery after 15°C cooldown prevents latch-up failures. |
| 26µA skip-mode quiescent current | Maintains >85% efficiency at 1mA load - critical for always-on CAN gateway or sensor fusion modules. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Providing clean, regulated 1.2V core and 1.8V I/O supplies to SoCs in head-unit or digital cluster systems. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 3A peak current with <100mV load transient deviation. Use Value: 2.2MHz switching avoids AM-band interference while maintaining <±3% output accuracy across -40°C to +125°C. |
Use Scenario: Powering image signal processors and high-speed serializers in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Dual-rail buck converter generating synchronized 3.3V and 1.2V outputs with coordinated PG signaling. Use Value: Integrated low-RDS(ON) switches and 8ms soft-start prevent startup glitches that corrupt image capture initialization. |
| Industrial Telematics Gateway | Ruggedized Data Logger |
|
Use Scenario: Regulating 3.3V microcontroller and 5V transceiver rails in LTE/CAN-based fleet management units. IC Role / Device Role / Timing Role: Automotive-qualified DC-DC with 1µA shutdown current enabling low-power wake-on-CAN operation. Use Value: Spread-spectrum disabled (RAUE variant) allows deterministic EMI profile for certified RF coexistence in metal enclosures. |
Use Scenario: Supplying FPGA and ADC subsystems in vibration-resistant environmental monitoring devices. IC Role / Device Role / Timing Role: High-efficiency buck converter operating from wide-input 3.3V–5.5V battery sources with overtemperature protection. Use Value: 16-pin TSSOP-EP package with exposed pad sustains 3A continuous output at +85°C ambient without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20004AATP/V+T | 4A rated, 2.2MHz, integrated FETs, but only 1.5V–5.5V input range and no SYNC input capability. | Designed for lower-voltage automotive domains (e.g., 1.8V/2.5V rails); lacks PG delay programming and spread-spectrum flexibility. | Select when higher current (4A) is required and SYNC synchronization is unnecessary. |
| TPS62933RTER | 3A, 2.5MHz, 2.7V–6V input, but uses external compensation and lacks automotive AEC-Q100 qualification. | Targeted at industrial/commercial designs; missing PG delay, thermal shutdown hysteresis, and -40°C to +125°C guaranteed operation. | Select for cost-sensitive non-automotive applications where AEC-Q100 compliance is not mandated. |
Compared with MAX16961RAUEA/V+T, MAX20004AATP/V+T offers higher current but sacrifices SYNC functionality and PG configurability, while TPS62933RTER trades automotive qualification and integrated features for wider input range and higher frequency - making MAX16961RAUEA/V+T optimal for safety-critical, thermally constrained infotainment power stages.
Availability
MAX16961RAUEA/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics gateways requiring stable component supply with AEC-Q100 Grade 2 qualification, -40°C to +125°C operation, and long-term production continuity.
Supply support for MAX16961RAUEA/V+T 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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets - emphasizing high reliability, integration, and AEC-Q100 compliance.
The MAX16961RAUEA/V+T belongs to Maxim's automotive-grade DC-DC converter family, engineered specifically for demanding point-of-load regulation in infotainment and ADAS subsystems where efficiency, thermal robustness, and EMI control are critical.
FAQ
What is the maximum output current capability of the MAX16961RAUEA/V+T under continuous operation?
The MAX16961RAUEA/V+T delivers up to 3.3A continuous output current when mounted on a standard 4-layer PCB with adequate copper pour and thermal vias under +70°C ambient. This rating accounts for package power dissipation limits (2088.8mW at +70°C, derated 26.1mW/°C above), junction temperature cap of +150°C, and 3.9A–6.3A overcurrent threshold. At full 3A load, typical efficiency exceeds 92% (5V→3.3V).
Does the MAX16961RAUEA/V+T support adjustable output voltage, and how is it configured?
Yes, the MAX16961RAUEA/V+T supports fully adjustable output voltage from 0.8V to 3.6V using an external resistive divider connected to the OUTS pin. Per the datasheet, R2 (OUTS-to-GND) must be ≤100kΩ, and R1 (VOUT-to-OUTS) is calculated as R1 = R2 × (VOUT/0.8V − 1). A 20kΩ pullup on PG and proper capacitor compensation across both resistors are mandatory for stability and noise immunity.
What is the function of the PWM pin on the MAX16961RAUEA/V+T, and how does it affect efficiency?
The PWM pin on the MAX16961RAUEA/V+T selects between forced-PWM mode (logic high) and skip mode (logic low). In forced-PWM, the device switches continuously at 2.2MHz regardless of load, ensuring low output ripple but higher light-load losses. In skip mode, switching pauses during light loads, reducing gate charge and switching losses - achieving 26µA quiescent current and >85% efficiency at 1mA, ideal for always-on automotive modules.
How is thermal management implemented in the MAX16961RAUEA/V+T, and what is its shutdown threshold?
The MAX16961RAUEA/V+T incorporates junction-temperature sensing with thermal shutdown triggered at +165°C (typical), followed by 15°C hysteresis before automatic recovery. Its 16-pin TSSOP-EP package features an exposed pad (EP) that must be soldered to a large contiguous copper ground plane with multiple thermal vias. With RθJA = 38.3°C/W, the device sustains 3A output at +85°C ambient when properly laid out - eliminating need for external heatsinks in most automotive enclosures.
What are the key differences between the MAX16961RAUEA/V+T and the MAX16961RATE/V+T variants?
The MAX16961RAUEA/V+T uses a 16-pin TSSOP-EP package with SYNC configured as input and spread-spectrum disabled, while MAX16961RATE/V+T uses the same package but enables spread-spectrum modulation to reduce radiated EMI peaks. Both share identical electrical specs, 0.8V–3.6V adjustability, and -40°C to +125°C operation. Choose RAUEA/V+T for deterministic EMI profiles; RATE/V+T when meeting CISPR 25 Class 5 emissions limits is critical.
MAX16961RAUEA/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MAX16961RAUEA/V+T FAQ
1.How can I place an order for MAX16961RAUEA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16961RAUEA/V+T 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 MAX16961RAUEA/V+T reliable?
The price and inventory of MAX16961RAUEA/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16961RAUEA/V+T is usually 5 days.
3.What payment methods are accepted for MAX16961RAUEA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16961RAUEA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16961RAUEA/V+T?
MAX16961RAUEA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16961RAUEA/V+T 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 MAX16961RAUEA/V+T?
For technical support, including MAX16961RAUEA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16961RAUEA/V+T requirements.
6.How does Aetrix verify that MAX16961RAUEA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX16961RAUEA/V+T 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 MAX16961RAUEA/V+T meets industry standards.
7.What is the process for return or replacement of MAX16961RAUEA/V+T?
All MAX16961RAUEA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16961RAUEA/V+T, 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 MAX16961RAUEA/V+T part is unused and in its original packaging.
Return procedure for MAX16961RAUEA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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