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Analog Devices Inc./Maxim Integrated MAX5096AAUP+T
- Part No.:
- MAX5096AAUP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX5096AAUP+T.pdf
- Description:
- IC REG BUCK ADJ/1.24V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,069
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Product details
Overview
MAX5096AAUP+T from Maxim Integrated is a dual-mode 40V, 600mA buck converter with integrated low-quiescent-current LDO regulator functionality. It operates as a high-efficiency PWM switcher (135kHz fixed frequency) under heavy load and transitions to LDO mode (<41μA IQ at 100μA load) during light-load or key-off conditions. Designed for automotive power rails, it delivers stable 5V output (fixed version) across -40°C to +125°C with integrated RESET, soft-start, and thermal protection.
For engineers reviewing the MAX5096AAUP+T datasheet, MAX5096AAUP+T pinout, MAX5096AAUP+T application, or MAX5096AAUP+T equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade operating parameters, and real-world design implications for dual-mode DC-DC conversion in battery-supervised systems.
Technical Context
The MAX5096AAUP+T implements current-mode PWM control in buck mode with external compensation via COMP pin and internal p-channel high-side switch (RDS(ON) = 0.9Ω typ). Its dual-mode architecture uses the same pass element and reference for both buck and LDO operation, but employs separate error amplifiers and compensation paths - LDO mode requires no external compensation.
Mode selection is dynamic via the LDO/BUCK pin: driving it high (>2V) forces immediate LDO activation (100μs delay), while pulling it low initiates buck operation after 32 clock cycles. The device integrates a 4V BP regulator (±7% accuracy), programmable power-on-reset (via CT capacitor), and synchronized soft-start (via SS capacitor) with monotonic voltage ramping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range (Buck) | +5V to +40V - supports wide automotive battery transients including cold-crank and load-dump conditions. |
| Input Voltage Range (LDO) | +4V to +40V - enables regulation down to near-battery cutoff, critical for key-off microcontroller retention. |
| Output Current (Buck) | 600mA continuous - sufficient for powering microcontrollers, CAN transceivers, and sensor interfaces without external boost. |
| Quiescent Current (LDO) | 41μA typical at 100μA load - enables <100μA system standby current when paired with low-IQ MCUs. |
| Switching Frequency | 135kHz fixed - keeps fundamental and harmonics below AM radio band (≤450kHz), reducing EMI filtering burden. |
| Thermal Shutdown | +165°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking in confined enclosures. |
| Reset Threshold Accuracy | 92% of VOUT nominal (±3%) - ensures reliable brownout detection for deterministic MCU reset sequencing. |
Pinout & Package
MAX5096AAUP+T is housed in a thermally enhanced 20-pin TSSOP-EP package with exposed pad (EP) for improved heat dissipation. The package supports 1.7W continuous power dissipation at TA = +70°C and features 46.0°C/W junction-to-ambient thermal resistance per JEDEC 51 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 15, 16 | IN | Main input supply connection - accepts up to +45V transient; requires parallel ceramic + aluminum bypass capacitors at PGND. |
| 4 | PGND | Power ground return for high-current p-channel switch and freewheeling diode - must be low-inductance connection to input/output caps. |
| 5 | SGND | Signal ground reference for feedback, control, and bias circuits - connect to PGND near CIN return to minimize noise coupling. |
| 6 | RESET | Open-drain active-low reset output - asserts when VOUT drops below 90% nominal; timeout programmable via CT capacitor. |
| 7 | BP | 4V internal auxiliary regulator output - powers internal circuitry; bypass with ≥1μF ceramic cap close to pin; not for external loading. |
| 8 | SYNC | External clock synchronization input - accepts 120–500kHz signal; tie to SGND if unused to disable sync function. |
| 9 | SS | Soft-start timer input - controls monotonic output ramp-up time via external capacitor; also enables output voltage tracking across multiple ICs. |
| 10 | CT | Reset timeout period setting - capacitor value determines RESET assertion duration after power-on or brownout recovery. |
| 11 | COMP | Buck-mode loop compensation node - connects external RC network to stabilize current-mode control; not used in LDO mode. |
| 12 | LDO/BUCK | Dynamic mode select input - high = LDO mode (low IQ), low = buck mode (high efficiency); transitions occur within 100μs or 32 clocks. |
| 13 | ADJ | Feedback reference point - tied to SGND for fixed 5V output (MAX5096B variant); used with resistor divider for adjustable 1.24–11V outputs. |
| 14 | OUT | Regulated output - requires ≥22μF low-ESR capacitor to PGND; supplies downstream logic, sensors, or communication ICs. |
| 17 | EN | Enable input with 1.4V logic-high threshold - internally pulldown; 6μA shutdown current enables always-on VIN connection without external pull-down. |
| 18, 19, 20 | LX | Drain of internal p-channel high-side switch - connects to inductor; carries peak currents up to 2A; requires tight layout to minimize ringing. |
| 8, 14, 18 | N.C. | No internal connection - leave unconnected; no electrical or thermal function. |
| EP | Exposed Pad | Thermal pad connected to SGND - must be soldered to large PCB copper area for effective heat transfer; not an electrical ground path. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode operation (Buck + LDO) | Eliminates need for separate low-IQ LDO in battery-supervised systems - reduces BOM count and PCB area by consolidating two regulators into one IC. |
| Programmable soft-start (SS pin) | Prevents inrush current-induced voltage droop on shared input rails - especially critical when powering multiple converters from limited-capacity batteries or USB-C PD sources. |
| Integrated power-on-reset (CT pin) | Enables deterministic system boot sequencing without external supervisor IC - timeout period set by single capacitor, eliminating timing uncertainty. |
| Output voltage tracking capability | Allows synchronized startup/shutdown of multiple MAX5096AAUP+T devices - essential for multi-rail SoC or FPGA applications requiring controlled VCCIO/VCORE sequencing. |
| Automotive temperature range | Validated operation from -40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for under-hood and infotainment module deployment. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and door-lock actuator drivers in a vehicle's BCM during ignition cycle and key-off sleep. IC Role / Device Role / Timing Role: Primary 5V rail generator with dynamic mode switching - operates in buck mode during engine run, transitions to LDO mode during key-off to maintain MCU RTC and wake-up logic. Use Value: Achieves <100μA total system standby current while retaining full wake-on-CAN capability - extends battery life beyond ISO 16750-2 quiescent current limits. |
Use Scenario: Providing isolated 5V logic supply for digital I/O modules in a DIN-rail mounted PLC with wide-input industrial power bus (24V ±20%). IC Role / Device Role / Timing Role: Main DC-DC converter delivering regulated 5V to FPGA configuration memory, level translators, and optocoupler drivers. Use Value: Withstands 40V transients and delivers 600mA without derating - eliminates need for upstream TVS clamping or oversized input capacitors in harsh factory environments. |
| Telematics Control Unit (TCU) Power Management | Automotive Camera Module Power |
Use Scenario: Generating clean 5V supply for LTE modem, GNSS receiver, and eSIM controller in a cellular-connected TCU with aggressive low-power states. IC Role / Device Role / Timing Role: Dual-mode regulator managing power state transitions between active data transmission (buck), idle monitoring (light-load buck), and deep-sleep (LDO). Use Value: Reduces average system power by 40% vs. fixed buck-only solution - extends cellular backup battery runtime during GPS-denied parking scenarios. |
Use Scenario: Powering image sensor, ISP, and MIPI serializer in a rear-view camera module exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Single-chip 5V source with integrated RESET and thermal shutdown - ensures safe power sequencing and fault containment during thermal stress events. Use Value: Eliminates discrete reset IC and thermal monitor - simplifies layout in space-constrained camera housings while meeting ASIL-B functional safety prerequisites. |
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 |
|---|---|---|---|
| MAX5097AAUP+T | 330kHz switching frequency (vs. 135kHz); identical pinout, package, and feature set. | Better suited for compact designs where smaller inductors/capacitors are prioritized over AM-band EMI compliance. | Select MAX5097AAUP+T when board area is constrained and EMI filtering cost must be minimized - otherwise MAX5096AAUP+T preferred for noise-sensitive RF environments. |
| TPS63020DSJR | Buck-boost topology (2.5–5.5V input); no LDO mode; 96% peak efficiency; 3mm × 3mm QFN. | Supports wider input range including single-cell Li-ion, but lacks automotive temperature rating and integrated RESET. | Choose TPS63020DSJR only for portable/battery-powered non-automotive applications requiring buck-boost capability - not suitable as drop-in replacement due to different topology and missing LDO/RESET functions. |
Compared with MAX5097AAUP+T, the MAX5096AAUP+T offers lower EMI emissions in AM radio bands and better light-load efficiency in LDO mode; compared with TPS63020DSJR, it provides guaranteed automotive temperature operation, integrated power sequencing, and true dual-mode flexibility - making it uniquely suited for battery-supervised automotive ECUs.
Availability
MAX5096AAUP+T is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O power supplies, telematics units, and camera module designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX5096AAUP+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 demanding industrial, automotive, and communications applications.
The MAX5096/MAX5097 product line was designed specifically for automotive power systems requiring ultra-low quiescent current during sleep modes while maintaining high efficiency during active operation - addressing the dual demands of ISO 16750-2 and OEM battery drain specifications.
FAQ
What is the maximum input voltage the MAX5096AAUP+T can withstand during transients?
The MAX5096AAUP+T supports an absolute maximum input voltage of +45V for 1ms transients, as specified in its Absolute Maximum Ratings table. This allows robust operation during automotive load-dump events without requiring external clamping components. Continuous operation remains limited to +40V, and the internal UVLO circuit engages at ~3.65V BP voltage to ensure monotonic startup behavior.
Can the MAX5096AAUP+T be used in adjustable-output configurations?
Yes, the MAX5096AAUP+T supports adjustable output voltages from 1.24V to 11V using an external resistor divider connected to the ADJ pin. When ADJ voltage exceeds 125mV, the device enters adjustable mode and regulates based on the divider ratio with a 1.237V internal reference. Fixed 5V output is achieved by connecting ADJ directly to SGND - matching the MAX5096B variant designation.
How does the LDO/BUCK pin control mode transitions in the MAX5096AAUP+T?
The LDO/BUCK pin on the MAX5096AAUP+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 allows microcontroller-based systems to dynamically switch modes during key-off sequences or low-power states - enabling seamless transition between 600mA buck delivery and 41μA LDO quiescent current.
Is external compensation required for both buck and LDO modes of the MAX5096AAUP+T?
External compensation via the COMP pin is required only in buck mode to stabilize the current-mode control loop - the LDO mode uses an internal amplifier with fixed compensation and requires no external components. This simplifies design when leveraging LDO functionality for low-power states, as the same IC can operate with or without compensation network depending on active mode.
What thermal performance can be expected from the MAX5096AAUP+T in a 20-pin TSSOP package?
In its 20-pin TSSOP-EP package, the MAX5096AAUP+T has a junction-to-ambient thermal resistance (θJA) of 46.0°C/W per JEDEC 51 standards. At TA = +70°C, it supports 1.7W continuous power dissipation before thermal shutdown activates at +165°C junction temperature. The exposed pad must be soldered to a minimum 200mm² copper area for rated performance - insufficient copper will cause premature thermal limiting.
MAX5096AAUP+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:
- 135kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
MAX5096AAUP+T FAQ
1.How can I place an order for MAX5096AAUP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5096AAUP+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 MAX5096AAUP+T reliable?
The price and inventory of MAX5096AAUP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5096AAUP+T is usually 5 days.
3.What payment methods are accepted for MAX5096AAUP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5096AAUP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5096AAUP+T?
MAX5096AAUP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5096AAUP+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 MAX5096AAUP+T?
For technical support, including MAX5096AAUP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5096AAUP+T requirements.
6.How does Aetrix verify that MAX5096AAUP+T is sourced from the original manufacturer or authorized distributors?
All MAX5096AAUP+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 MAX5096AAUP+T meets industry standards.
7.What is the process for return or replacement of MAX5096AAUP+T?
All MAX5096AAUP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5096AAUP+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 MAX5096AAUP+T part is unused and in its original packaging.
Return procedure for MAX5096AAUP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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