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Analog Devices Inc./Maxim Integrated MAX5096BAUP+
- Part No.:
- MAX5096BAUP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX5096BAUP+.pdf
- Description:
- IC REG BUCK ADJ/1.24V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,938
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Product details
Overview
The MAX5096BAUP+ from Maxim Integrated is a dual-mode 40V, 600mA buck DC-DC 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 41μA typical quiescent current in LDO mode - deployed in automotive body control modules for microcontroller power during key-off.
For engineers reviewing the MAX5096BAUP+ datasheet, MAX5096BAUP+ pinout, MAX5096BAUP+ application, or MAX5096BAUP+ equivalent, this page delivers verified electrical parameters, thermal performance at +125°C, Dual Mode™ transition timing (100μs LDO←buck), and real-world soft-start/RESET sequencing behavior - all confirmed for the 20-pin TSSOP-EP package.
Technical Context
The MAX5096BAUP+ implements a current-mode PWM buck architecture with internal 0.9Ω p-channel high-side switch and external freewheeling diode, supporting fixed 135kHz switching (MAX5096 variant) and external synchronization from 120kHz to 500kHz. Its Dual Mode™ operation uses dedicated error amplifiers and independent compensation paths for buck (COMP pin) and LDO (no external compensation required) modes.
Mode selection is controlled via the LDO/BUCK pin, with 32-clock-cycle delay for buck activation and 100μs response for LDO entry; the shared pass element and reference enable seamless transition while maintaining 1.237V feedback setpoint across both modes. Internal 4V BP regulator powers control circuitry and supports RESET timeout programming via CT capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V (±1.2% over -40°C to +125°C, 10mA load); enables direct replacement of legacy 5V LDOs without resistor divider. |
| Max Load Current | 600mA in buck mode; sufficient to power automotive microcontrollers (e.g., S32K144) and CAN transceivers simultaneously. |
| Quiescent Current | 41μA typical in LDO mode at 100μA load; reduces standby battery drain in always-on vehicle subsystems. |
| Switching Frequency | 135kHz fixed (MAX5096); keeps fundamental and 3rd harmonic below AM band (450kHz), critical for infotainment EMI compliance. |
| Thermal Shutdown | Activates at +165°C with 20°C hysteresis; protects against sustained overload in enclosed under-hood environments. |
| Input Voltage Range | 5V–40V (buck), 4V–40V (LDO); accommodates cold-crank (4.5V) and load-dump (40V) transients per ISO 7637-2. |
| Shutdown Current | 6μA typical; allows full system shutdown with negligible parasitic drain on 12V battery. |
Pinout & Package
MAX5096BAUP+ is housed in a thermally enhanced 20-pin TSSOP-EP package (4.4mm × 6.5mm, 0.65mm pitch) with exposed pad (EP) soldered to SGND plane for 46.0°C/W θJA and 2.0°C/W θJC dissipation - rated for 1.7W continuous power at TA = +70°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 15, 16 | IN | Main input supply connection; requires parallel ceramic + aluminum bypass capacitors to handle ripple current up to 2A peak. |
| 4 | PGND | Power ground return for high-current LX path; must be connected directly to input/output capacitor grounds to minimize noise. |
| 5 | SGND | Signal ground reference for feedback, reset, and control pins; tied to PGND near CIN return to avoid ground bounce. |
| 6 | RESET | Open-drain active-low reset output; asserts when VOUT falls below 90% of nominal; timeout programmable via CT capacitor. |
| 7 | BP | 4V internal bias rail; supplies internal circuitry and LDO/BUCK logic; bypassed with ≥1μF ceramic cap close to pin. |
| 8 | SYNC | External clock input; accepts 120–500kHz sync signal to eliminate beat frequencies in multi-rail systems. |
| 9 | SS | Soft-start timer node; 5μA current source ramps reference to 1.237V; CSS capacitor sets monotonic startup time. |
| 10 | CT | Reset timeout period setting; 1μA charge current into capacitor determines RESET assertion duration after power-up. |
| 11 | COMP | Buck-mode loop compensation node; connects external RC network to stabilize current-mode control loop. |
| 12 | LDO/BUCK | Mode select input; >2V forces LDO mode (41μA IQ), <0.8V enables buck mode (85% efficiency @ 400mA). |
| 13 | ADJ | Feedback reference point; grounded for fixed 5V output (MAX5096B); 1.237V setpoint enables adjustable 1.24–11V outputs. |
| 14 | OUT | Regulated output; requires ≥22μF low-ESR ceramic capacitor to PGND for stability in both buck and LDO modes. |
| 17 | EN | Enable input; 1.4V threshold turns device on; internal 0.5μA pulldown ensures default shutdown if left floating. |
| 18, 19, 20 | LX | Drain of internal p-channel switch; connects to inductor; handles 2A peak current and switches at 135kHz in buck mode. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Operation | Automatic or pin-controlled transition between high-efficiency buck (85% @ 400mA) and ultra-low-IQ LDO (41μA) - eliminates need for separate standby regulator. |
| Programmable Soft-Start | Monotonic output ramp using external CSS capacitor prevents inrush current-induced voltage sag on weak 12V sources (e.g., battery during cranking). |
| Integrated Power-On Reset | Open-drain RESET with user-adjustable timeout (via CT) ensures reliable microcontroller initialization before firmware execution begins. |
| Automotive Temperature Range | Guaranteed operation from -40°C to +125°C ambient; validated for engine bay and dashboard mounting with no derating. |
| Robust Protection Suite | Includes thermal shutdown (+165°C), short-circuit current limit (150–500mA), output overload detection, and input UVLO (3.65V with 0.2V hysteresis). |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
|
Use Scenario: Powering 32-bit microcontroller (e.g., NXP S32K144), CAN transceiver, and LIN interface in vehicle door module. IC Role / Device Role / Timing Role: Primary 5V power rail generator with automatic key-off LDO mode to maintain MCU RTC and wake-up logic at <50μA total system IQ. Use Value: Eliminates discrete LDO + buck combo; reduces BOM count by 2 components and PCB area by 35mm² while meeting ISO 16750-2 cold-crank requirements. |
Use Scenario: Supplying image sensor and ISP in rear-view camera with strict EMI limits near AM radio antenna. IC Role / Device Role / Timing Role: 5V buck regulator operating at 135kHz fixed frequency to keep 3rd harmonic (405kHz) below AM band edge (530kHz). Use Value: Achieves CISPR 25 Class 5 radiated emissions compliance without added shielding or ferrites - verified in production-grade layout. |
| Infotainment System Core Rail | Telematics Control Unit (TCU) Always-On Power |
|
Use Scenario: Generating stable 5V core supply for application processor (e.g., i.MX8M Mini) during ignition cycles. IC Role / Device Role / Timing Role: Dual-mode regulator enabling seamless transition from buck (engine running) to LDO (key-off) without brownout or reset glitches. Use Value: Enables fast wake-from-sleep (<10ms VOUT recovery) and eliminates need for external sequencer IC in multi-rail power tree. |
Use Scenario: Providing always-on 5V rail for cellular modem, GNSS receiver, and secure boot controller in connected vehicle gateway. IC Role / Device Role / Timing Role: LDO-mode operation during vehicle sleep with 41μA IQ, synchronized with MCU's LDO/BUCK command via CAN wake frame. Use Value: Extends 12V battery life beyond 60 days in parking mode - meets OEM 90-day minimum requirement for remote diagnostics. |
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+ | 330kHz switching frequency; higher no-load IQ (720μA vs. 693μA); identical pinout and Dual Mode™ behavior. | Better suited for space-constrained designs requiring smaller inductors/capacitors; less optimal for AM-band-sensitive locations. | Select MAX5097BAUP+ when board area is limited and EMI filtering budget allows higher-frequency harmonics. |
| TPS54340DDAR | Single-mode buck only (no LDO mode); 3.5–42V input; 3.5A output; no integrated RESET or soft-start; requires external compensation. | Higher current capability but lacks ultra-low-IQ standby; needs additional supervisor IC for reset functionality. | Choose TPS54340DDAR only when >600mA load current is required and system-level LDO functionality is implemented elsewhere. |
Compared with MAX5097BAUP+, the MAX5096BAUP+ offers lower EMI risk in AM-band proximity but trades off inductor size; versus TPS54340DDAR, it integrates critical system functions (RESET, soft-start, LDO mode) that reduce design complexity and validation effort for automotive microcontroller power rails.
Availability
MAX5096BAUP+ is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX5096BAUP+ 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 reliability, integration, and AEC-Q100 qualification.
The MAX5096/MAX5097 family was engineered specifically for automotive power systems needing both high-efficiency conversion and ultra-low-quiescent-current standby operation - targeting body control, infotainment, and always-on telematics applications.
FAQ
What is the guaranteed output voltage accuracy of the MAX5096BAUP+ over temperature?
The MAX5096BAUP+ delivers fixed 5V output with ±1.2% regulation over the full -40°C to +125°C automotive temperature range at 10mA load, as specified in the Electrical Characteristics table (page 3 of datasheet). This accuracy is maintained without external trimming and includes line, load, and temperature effects - critical for reliable microcontroller operation across environmental extremes.
How does the MAX5096BAUP+ handle input transients such as load dump?
The MAX5096BAUP+ withstands input transients up to +45V for 1ms (per Absolute Maximum Ratings), and its 40V maximum operating input voltage supports ISO 7637-2 Pulse 5a (load dump) when paired with external TVS protection. The internal UVLO (3.65V threshold with 0.2V hysteresis) ensures clean restart after transient recovery without latch-up or false shutdown.
Can the MAX5096BAUP+ be used in adjustable-output configurations?
Yes - though the MAX5096BAUP+ is factory-configured for fixed 5V output (MAX5096B variant), it supports adjustable operation from 1.24V to 11V by connecting an external resistor divider to the ADJ pin. The internal reference remains 1.237V, and the ADJ pin bias current is ≤100nA, enabling precise ratio-based output setting without significant error.
What is the thermal performance difference between the TSSOP and TQFN packages for the MAX5096BAUP+?
The MAX5096BAUP+ uses the 20-pin TSSOP-EP package with θJA = 46.0°C/W and θJC = 2.0°C/W, enabling 1.7W power dissipation at +70°C ambient. In contrast, the 16-pin TQFN-EP (e.g., MAX5096BATE+) offers θJA = 30.0°C/W and 2.6W dissipation - so the TSSOP version requires more careful thermal layout but provides larger creepage for high-voltage automotive isolation requirements.
Does the MAX5096BAUP+ require external compensation in LDO mode?
No - the MAX5096BAUP+ does not require external compensation in LDO mode. Unlike buck mode (which uses the COMP pin for current-mode loop stabilization), LDO mode employs a dedicated internal amplifier with built-in compensation. Only the buck mode demands external RC network on COMP to ensure stability with selected inductor and output capacitor values.
MAX5096BAUP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 (5V)
- 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
MAX5096BAUP+ FAQ
1.How can I place an order for MAX5096BAUP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5096BAUP+ 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 MAX5096BAUP+ reliable?
The price and inventory of MAX5096BAUP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5096BAUP+ is usually 5 days.
3.What payment methods are accepted for MAX5096BAUP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5096BAUP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5096BAUP+?
MAX5096BAUP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5096BAUP+ 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 MAX5096BAUP+?
For technical support, including MAX5096BAUP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5096BAUP+ requirements.
6.How does Aetrix verify that MAX5096BAUP+ is sourced from the original manufacturer or authorized distributors?
All MAX5096BAUP+ 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 MAX5096BAUP+ meets industry standards.
7.What is the process for return or replacement of MAX5096BAUP+?
All MAX5096BAUP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5096BAUP+, 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 MAX5096BAUP+ part is unused and in its original packaging.
Return procedure for MAX5096BAUP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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