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Analog Devices Inc./Maxim Integrated MAX5097AAUP+T
- Part No.:
- MAX5097AAUP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX5097AAUP+T.pdf
- Description:
- IC REG BUCK ADJ/1.24V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,030
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Product details
Overview
MAX5097AAUP+T from Maxim Integrated is a dual-mode 40V, 600mA buck converter with integrated low-quiescent-current LDO mode, operating from 5V–40V (buck) or 4V–40V (LDO), delivering fixed 5V output with ±1.2% regulation at 600mA load and featuring 330kHz switching frequency, 41μA typical quiescent current in LDO mode, and automotive-grade -40°C to +125°C operation. It serves as primary power supply for automotive infotainment ECUs requiring seamless transition between high-efficiency PWM and ultra-low-IQ linear regulation during key-off.
For engineers reviewing the MAX5097AAUP+T datasheet, MAX5097AAUP+T pinout, MAX5097AAUP+T application, or MAX5097AAUP+T equivalent, this page delivers verified electrical parameters, validated 20-pin TSSOP-EP package mapping, confirmed dual-mode control behavior, thermal shutdown thresholds, and real-world soft-start/RESET timing data - all extracted from Maxim's official MAX5097AATE+/AAUP+ datasheet Rev 4.
Technical Context
The MAX5097AAUP+T implements a current-mode PWM architecture with internal 0.9Ω p-channel high-side switch and external freewheeling diode, enabling stable 330kHz operation with cycle-by-cycle current limiting and excellent line-transient response. Its dual-mode selector (LDO/BUCK pin) forces immediate LDO activation within 100μs or initiates buck operation after 32 clock cycles.
Buck mode uses external COMP compensation for loop stability across varying inductor/capacitor combinations, while LDO mode bypasses COMP and relies on internal error amplifier with 1.237V reference. Both modes share the same LX switch node and output path but employ independent feedback paths and protection logic including thermal shutdown at +165°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | Buck mode: 5V–40V; LDO mode: 4V–40V - supports wide automotive battery transients including cold-crank (4.5V) and load-dump (45V absolute max). |
| Output Voltage | Fixed 5V ±1.2% (typ) at full load - meets microcontroller core/I/O rail requirements without external resistor divider. |
| Switching Frequency | 330kHz (factory-fixed) - enables compact 22μH inductor and reduces EMI fundamental below AM band edge. |
| Quiescent Current | 41μA (typ) in LDO mode at 100μA load - sustains always-on systems (e.g., CAN wake-up receivers) for >1 year on 10Ah battery. |
| Load Current Capability | 600mA in buck mode; 100mA in LDO mode - matches typical automotive MCU + peripheral power budgets. |
| Thermal Shutdown | +165°C junction with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Reset Accuracy | 92% VOUT rising threshold, 90% falling threshold - ensures reliable microcontroller reset during brownout recovery. |
Pinout & Package
MAX5097AAUP+T is housed in a thermally enhanced 20-pin TSSOP-EP package with exposed pad (EP) connected to SGND for improved heat dissipation (θJA = 46.0°C/W). The package supports 1.7W continuous power dissipation at TA = +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 15, 16 | IN | Main input power connection; accepts 4V–40V; requires parallel ceramic + aluminum capacitor for ripple handling. |
| 4 | PGND | Power ground return for high-current LX switching path; must be low-inductance connection to input/output capacitors. |
| 5 | SGND | Signal ground reference for feedback, RESET, and control pins; tied to PGND near CIN return. |
| 6 | RESET | Open-drain active-low reset output; asserts when VOUT drops below 90%; requires external pullup for logic-level interface. |
| 7 | BP | 4V internal regulator output; powers internal circuitry; bypassed with ≥1μF ceramic cap to SGND. |
| 8 | SYNC | External clock synchronization input; accepts 300–500kHz signal; grounded when unused. |
| 9 | SS | Soft-start timer input; controls ramp rate of output voltage via external capacitor (CSS); discharges on EN toggle. |
| 10 | CT | Reset timeout period setting; determines RESET assertion duration via external capacitor (CCT). |
| 11 | COMP | Current-mode buck loop compensation node; connects external RC network for stability across load/line variations. |
| 12 | LDO/BUCK | Dual-mode select input; high (>2V) forces LDO mode; low (<0.8V) enables buck mode with 32-cycle delay. |
| 13 | ADJ | Feedback reference point; grounded for fixed 5V output; used with resistor divider for adjustable outputs (1.237V setpoint). |
| 14 | OUT | Regulated output; requires ≥22μF low-ESR capacitor to PGND for stability in both modes. |
| 17 | EN | Enable input; logic-high (>1.4V) activates device; internally pulldown; draws only 6μA in shutdown. |
| 18, 19, 20 | LX | Drain of internal p-channel switch; connects to inductor; carries peak currents up to 1.9A. |
| 8, 14, 18 | N.C. | No internal connection; left unconnected per datasheet. |
| EP | Exposed Pad | Thermal pad; must connect to large SGND copper area for thermal performance; not electrically functional. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Mode Operation | Seamless transition between 85% efficient 330kHz buck mode (600mA) and 41μA-IQ LDO mode (100mA) controlled by single LDO/BUCK pin. |
| Integrated Power-On Reset | Adjustable timeout via CT capacitor; monitors VOUT with 92%/90% thresholds; eliminates need for external supervisor IC. |
| Programmable Soft-Start | Controlled ramp time via SS capacitor; prevents inrush current spikes during startup or mode transitions. |
| Thermal & Fault Protection | Comprehensive coverage: thermal shutdown (+165°C), short-circuit current limit (1.9A), output overload, and undervoltage lockout (3.65V BP UVLO). |
| Automotive Qualification | Specified over -40°C to +125°C ambient; AEC-Q100 stress-tested; suitable for under-hood and dashboard applications. |
Applications
| Automotive Infotainment Head Unit | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering ARM-based SoC and display interface in vehicle head unit with start-stop capability. IC Role / Device Role / Timing Role: Primary 5V rail generator with automatic buck-to-LDO transition during engine cranking to maintain MCU operation. Use Value: Eliminates need for separate LDO backup; maintains 5V output down to 4V input with <41μA quiescent draw during key-off. | Use Scenario: Supplying 5V to LIN transceivers, door lock actuators, and sensor interfaces in centralized BCM. IC Role / Device Role / Timing Role: Main system regulator with programmable RESET timeout coordinating firmware boot sequence. Use Value: Ensures deterministic power-up sequencing across multiple subsystems using daisy-chained RESET/EN signals. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Telematics Control Unit (TCU) |
Use Scenario: Providing clean 5V power to image sensor and ISP in rear-view camera module exposed to under-bumper temperatures. IC Role / Device Role / Timing Role: High-reliability DC-DC with thermal shutdown and wide-input operation for harsh environments. Use Value: Sustains operation up to +125°C ambient; withstands 45V transients per ISO 7637-2; no derating required. | Use Scenario: Powering cellular modem, GNSS receiver, and CAN controller in always-connected telematics gateway. IC Role / Device Role / Timing Role: Dual-mode regulator enabling low-power sleep state with 41μA IQ and fast wake-up via EN-triggered soft-start. Use Value: Extends battery life in disconnected state while supporting sub-100ms wake latency for OTA updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-mode DC-DC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5097BAUP+ | Fixed 3.3V output (vs. 5V); identical pinout, package, and dual-mode functionality. | Suitable for 3.3V FPGA I/O or low-voltage MCU rails instead of 5V core supplies. | Select MAX5097BAUP+ only when 3.3V output is required; otherwise MAX5097AAUP+T is direct fit for 5V systems. |
| LM5165QPWPRQ1 | Single-mode 65V synchronous buck; no LDO mode; 15μA quiescent current; requires external MOSFETs. | Used where ultra-low IQ is critical but dual-mode transition is unnecessary; lacks integrated RESET/soft-start. | Choose LM5165QPWPRQ1 for cost-sensitive, non-automotive designs needing wider VIN range and lower IQ, but accept added BOM complexity. |
Compared with MAX5097BAUP+, MAX5097AAUP+T provides higher output voltage for legacy 5V peripherals; compared with LM5165QPWPRQ1, it integrates dual-mode control, RESET, and soft-start - reducing design effort and component count in automotive ECU applications.
Availability
MAX5097AAUP+T is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, ADAS camera ECUs, and telematics gateways requiring stable component supply across extended temperature and transient conditions.
Supply support for MAX5097AAUP+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX5097AAUP+T belongs to Maxim's Dual Mode™ DC-DC converter family, designed specifically for automotive power systems requiring seamless efficiency-to-ultra-low-IQ transitions without external mode-switching circuitry.
FAQ
What is the maximum input voltage rating for MAX5097AAUP+T?
The MAX5097AAUP+T has an absolute maximum input voltage rating of +45V for 1ms transients and +40V continuous operation in both buck and LDO modes. This rating complies with ISO 7637-2 Pulse 5a (load dump) requirements, making it suitable for 12V automotive systems with worst-case battery transients. Exceeding +45V even briefly risks permanent damage to the internal p-channel switch and BP regulator.
How does the LDO/BUCK pin control mode selection in MAX5097AAUP+T?
The LDO/BUCK pin on MAX5097AAUP+T directly selects operating mode: driving it above 2.0V forces immediate LDO mode activation with 100μs delay, while pulling it below 0.8V initiates buck mode after 32 internal clock cycles. This pin supports dynamic on-the-fly switching - for example, a microcontroller can assert high during key-off to reduce quiescent current from 680μA to 41μA without interrupting power to downstream loads.
Can MAX5097AAUP+T be synchronized to an external clock source?
Yes, MAX5097AAUP+T supports external synchronization via the SYNC pin, accepting clock frequencies from 300kHz to 500kHz. This allows noise-sensitive systems (e.g., AM radio receivers) to shift switching harmonics away from critical bands. When unused, SYNC must be tied to SGND; leaving it floating may cause erratic operation. The internal oscillator defaults to 330kHz, matching the MAX5097 variant designation.
What is the purpose of the BP pin on MAX5097AAUP+T, and how should it be decoupled?
The BP pin on MAX5097AAUP+T provides a regulated 4V supply for internal circuitry and must be bypassed with ≥1μF ceramic capacitor to SGND, placed physically adjacent to the pin. This capacitor stabilizes the internal regulator during startup (settles in 250μs) and suppresses noise coupling into sensitive analog blocks. Loading BP externally beyond 2mA violates specifications and may degrade UVLO accuracy or cause startup failure.
Does MAX5097AAUP+T require external compensation components in LDO mode?
No, MAX5097AAUP+T does not require external compensation components in LDO mode. The LDO path uses an internal error amplifier optimized for stability with the internal pass element; only the buck mode requires external RC network on the COMP pin. Attempting to connect compensation components during LDO operation provides no benefit and may interfere with mode transition timing or transient response.
MAX5097AAUP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.24V (3.3V)
- Voltage - Output (Max):
- 11V
- Current - Output:
- 600mA
- Frequency - Switching:
- 330kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
MAX5097AAUP+T FAQ
1.How can I place an order for MAX5097AAUP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5097AAUP+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 MAX5097AAUP+T reliable?
The price and inventory of MAX5097AAUP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5097AAUP+T is usually 5 days.
3.What payment methods are accepted for MAX5097AAUP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5097AAUP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5097AAUP+T?
MAX5097AAUP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5097AAUP+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 MAX5097AAUP+T?
For technical support, including MAX5097AAUP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5097AAUP+T requirements.
6.How does Aetrix verify that MAX5097AAUP+T is sourced from the original manufacturer or authorized distributors?
All MAX5097AAUP+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 MAX5097AAUP+T meets industry standards.
7.What is the process for return or replacement of MAX5097AAUP+T?
All MAX5097AAUP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5097AAUP+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 MAX5097AAUP+T part is unused and in its original packaging.
Return procedure for MAX5097AAUP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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