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Analog Devices Inc./Maxim Integrated MAX5097BAUP+T
- Part No.:
- MAX5097BAUP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX5097BAUP+T.pdf
- Description:
- IC REG BUCK ADJ/1.24V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,106
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Product details
Overview
MAX5097BAUP+T 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, 85% efficiency at 14VIN/5VOUT/400mA, and 41μA typical quiescent current in LDO mode - used in automotive body control modules for microcontroller power rail management during key-off.
For engineers reviewing the MAX5097BAUP+T datasheet, MAX5097BAUP+T pinout, MAX5097BAUP+T application, or MAX5097BAUP+T equivalent, this page delivers verified electrical parameters, thermal performance at +125°C, Dual Mode™ transition timing (100μs LDO←Buck), RESET timeout programmability, and real-world soft-start behavior under load transients - all confirmed for the 20-pin TSSOP-EP package.
Technical Context
The MAX5097BAUP+T implements a current-mode PWM buck architecture with internal 0.9Ω p-channel high-side switch and external freewheeling diode, synchronized to 330kHz factory-fixed frequency (±10%) or externally via SYNC input (300–500kHz). Its Dual Mode™ operation uses separate error amplifiers and compensation paths for buck (COMP pin) and LDO (no external compensation required) modes, sharing the same pass element and reference but switching control logic on-the-fly via LDO/BUCK pin.
It integrates a 4V internal BP regulator (±7% accuracy), programmable power-on-reset with CT-based timeout, and thermal shutdown at +165°C with 20°C hysteresis. The device supports output tracking via SS pin daisy-chaining and sequencing via RESET-to-EN cascading - all validated across the full -40°C to +125°C automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±1.2% (at 10mA, 5.5V–40VIN); enables direct replacement of legacy 5V LDOs without feedback divider redesign. |
| Switching Frequency | 330kHz (factory-fixed, ±10%); reduces external inductor/capacitor size vs. 135kHz versions while staying below EMI-sensitive AM band harmonics. |
| Max Output Current | 600mA in buck mode; limited by thermal dissipation in 20-pin TSSOP-EP (1.7W @ +70°C ambient). |
| LDO Quiescent Current | 41μA typical at 100μA load; enables <100μA system standby current in automotive key-off scenarios. |
| Shutdown Current | 6μA typical; ensures minimal battery drain when EN = 0V, validated over full -40°C to +125°C range. |
| Thermal Shutdown | +165°C junction temperature with 20°C hysteresis; prevents permanent damage during sustained overload or poor heatsinking. |
| RESET Accuracy | 92% VOUT rising threshold (±3%); guarantees reliable microcontroller reset assertion during brownout recovery. |
Pinout & Package
MAX5097BAUP+T is housed in a thermally enhanced 20-pin TSSOP-EP package (exposed pad soldered to SGND plane), rated for 1.7W continuous power dissipation at +70°C ambient (θJA = 46.0°C/W, θJC = 2.0°C/W). Pin functions are electrically validated per Maxim's official pin description table and schematic Figure 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 15, 16 | IN | Main input supply path (5V–40V); requires parallel ceramic + aluminum bypass capacitors to handle ripple current. |
| 4 | EN | Logic-enable input (1.4V high threshold); internally pulldown; drives device into 6μA shutdown when low or floating. |
| 5 | PGND | Power ground return for high-side switch and freewheeling diode; must connect to input/output capacitor grounds. |
| 6 | SGND | Signal ground; tied to PGND near input capacitor; reference for BP, COMP, ADJ, SS, CT, SYNC, RESET. |
| 7 | RESET | Open-drain active-low reset output; asserts when VOUT falls below 90% nominal; timeout set by CT capacitor. |
| 8 | BP | 4V internal regulator output; bypassed with ≥1μF ceramic cap to SGND; powers internal circuitry only. |
| 9 | SYNC | External clock synchronization input (300–500kHz compatible); grounded when unused to disable sync. |
| 10 | SS | Soft-start timer input; controls ramp-up time via CSS capacitor; enables output voltage tracking across multiple ICs. |
| 11 | CT | Reset timeout period setting; capacitor value determines RESET active duration after power-up or brownout. |
| 12 | COMP | Buck-mode loop compensation node; connects external RC network for stability with selected inductor/capacitor. |
| 13 | LDO/BUCK | Mode select control; >2V forces LDO mode (100μA IQ); <0.8V selects buck mode (600mA IOUT). |
| 14 | ADJ | Feedback node; grounded for fixed 5V output (MAX5097B); >125mV enables adjustable mode (1.237V reference). |
| 17 | OUT | Regulated output; requires ≥22μF low-ESR capacitor to PGND for stability in both buck and LDO modes. |
| 18, 19, 20 | LX | Drain of internal p-channel high-side switch; connects to inductor; carries peak currents up to 1.9A. |
| 8, 14, 18 | N.C. | No-connect pins; not internally bonded; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Operation | Seamless on-the-fly transition between 600mA buck (85% eff.) and 100mA LDO (41μA IQ) using single LDO/BUCK pin - eliminates need for external mode-switching circuitry. |
| Programmable Power-On Reset | CT capacitor sets precise RESET timeout (e.g., 0.01μF = ~12.4ms); ensures deterministic microcontroller initialization timing across temperature and supply variations. |
| Output Voltage Tracking | SS pin current-source enables monotonic, matched-ramp startup/shutdown of multiple MAX5097BAUP+T devices - critical for multi-rail SoC power sequencing. |
| Thermal Protection with Hysteresis | +165°C shutdown with 20°C recovery hysteresis prevents thermal cycling damage and maintains safe junction temperature under sustained overload. |
| Automotive Temperature Range | -40°C to +125°C operation with guaranteed parameters; qualified per AEC-Q100 stress test requirements for under-hood applications. |
Applications
| Body Control Module (BCM) | Infotainment Power Supply |
|---|---|
|
Use Scenario: Powering MCU, CAN transceiver, and sensor interface in vehicle door module during ignition-off state. IC Role / Device Role / Timing Role: Provides 5V rail in LDO mode (41μA IQ) during key-off; switches to buck mode upon wake-up signal to deliver 600mA for full BCM operation. Use Value: Enables <100μA total system standby current while maintaining fast wake-up response (<100μs mode transition) and robust brownout recovery via RESET. |
Use Scenario: Generating stable 5V supply for display controller and audio codec in head-unit during engine start transient. IC Role / Device Role / Timing Role: Delivers 600mA at 85% efficiency in buck mode; maintains regulation during 5V–40V input swing; uses SS pin to track auxiliary 3.3V rail. Use Value: Eliminates need for discrete LDO post-regulator; reduces BOM count by 2 components while meeting CISPR-25 conducted EMI limits via 330kHz switching. |
| Telematics Control Unit (TCU) | Advanced Driver Assistance System (ADAS) Camera Power |
|
Use Scenario: Powering LTE modem and GNSS receiver in always-connected telematics gateway with strict battery drain limits. IC Role / Device Role / Timing Role: Operates in LDO mode during sleep (41μA IQ); transitions to buck mode on cellular data burst; uses RESET to coordinate firmware watchdog reset. Use Value: Extends battery backup runtime by 3× vs. standard buck-only converters; meets ISO 16750-2 pulse 4 (load dump) immunity with 45V absolute max input rating. |
Use Scenario: Supplying 5V to image sensor and ISP in rear-view camera exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Regulates 5V output across -40°C to +125°C ambient; uses thermal shutdown + hysteresis to prevent field failure during prolonged sun exposure. Use Value: Guarantees uninterrupted video stream during thermal stress; achieves ±0.374mV/mA load regulation (5V version) to prevent sensor gain drift. |
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 |
|---|---|---|---|
| MAX5097AATE+ | 16-pin TQFN-EP package; 3.3V fixed output; 2.6W thermal dissipation at +70°C; identical 330kHz frequency and Dual Mode™ architecture. | Used where board space is constrained and 3.3V rail required; lacks TSSOP's larger creepage for high-voltage isolation. | Select when footprint reduction and 3.3V output are prioritized over mechanical robustness and higher current headroom. |
| LM5165QPWPRQ1 | Single-mode 60V buck only; no LDO mode; 150mA IQ; requires external compensation; AEC-Q100 Grade 1 (-40°C to +125°C). | Suitable for cost-sensitive designs where ultra-low standby current is not required; lacks integrated RESET and soft-start programmability. | Choose only if LDO functionality is unnecessary and existing layout supports TSSOP-to-HTSSOP adapter; verify RESET circuit redesign. |
Compared with MAX5097AATE+, the MAX5097BAUP+T provides higher output voltage (5V vs. 3.3V) and superior thermal margin in TSSOP packaging, while LM5165QPWPRQ1 offers wider input range (60V) but sacrifices Dual Mode™ flexibility, integrated reset, and sub-100μA quiescent operation - making MAX5097BAUP+T optimal for automotive 5V MCU rails requiring zero-battery-drain sleep.
Availability
MAX5097BAUP+T is available at Aetrix Electronics and suitable for automotive body control modules, infotainment systems, telematics gateways, and ADAS camera power supplies requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX5097BAUP+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 MAX5097BAUP+T belongs to Maxim's Dual Mode™ DC-DC converter family, designed specifically for automotive power systems needing both high-efficiency switching and ultra-low-quiescent linear regulation in a single IC - eliminating redundant regulators and simplifying multi-rail power architecture.
FAQ
What is the maximum input voltage the MAX5097BAUP+T can withstand?
The MAX5097BAUP+T has an absolute maximum input voltage rating of +45V for 1ms transients and +40V continuous operation in both buck and LDO modes. This 40V rating supports 24V automotive systems with load dump protection, and the 45V transient tolerance aligns with ISO 7637-2 Pulse 5a requirements - ensuring reliable operation in harsh vehicle electrical environments without external clamping.
How does the MAX5097BAUP+T switch between buck and LDO modes?
The MAX5097BAUP+T switches modes via the LDO/BUCK pin: driving it above 2.0V forces immediate LDO mode (41μA IQ, 100mA IOUT), while pulling it below 0.8V initiates buck mode (330kHz, 600mA IOUT) after 32 clock cycles. The transition from buck to LDO takes 100μs; LDO to buck takes 32 internal clock periods (~97μs at 330kHz). This behavior is fully characterized and guaranteed across -40°C to +125°C.
Can the MAX5097BAUP+T be synchronized to an external clock?
Yes, the MAX5097BAUP+T supports external synchronization via the SYNC pin, accepting input frequencies from 300kHz to 500kHz - matching its native 330kHz switching frequency. When synchronized, the internal oscillator locks to the external clock edge, enabling EMI reduction through frequency dithering or alignment with system clocks. SYNC must be pulled to SGND if unused to prevent noise coupling.
What is the purpose of the BP pin on the MAX5097BAUP+T?
The BP pin on the MAX5097BAUP+T outputs a regulated 4V supply (±7%) used exclusively to power internal circuitry, including the UVLO comparator and mode-select logic. It must be bypassed with ≥1μF ceramic capacitor to SGND, placed adjacent to the pin. BP is not intended for external loads - drawing >2mA risks regulation loss and may cause erratic LDO/BUCK pin behavior or premature UVLO shutdown.
Does the MAX5097BAUP+T require external compensation in LDO mode?
No, the MAX5097BAUP+T requires no external compensation in LDO mode - unlike buck mode which uses the COMP pin for loop stabilization. In LDO mode, internal compensation ensures stability with the recommended 22μF low-ESR output capacitor. This simplifies design for battery-backed applications where the device operates primarily in LDO mode, reducing component count and PCB area versus dual-compensated solutions.
MAX5097BAUP+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 (5V)
- 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
MAX5097BAUP+T FAQ
1.How can I place an order for MAX5097BAUP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5097BAUP+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 MAX5097BAUP+T reliable?
The price and inventory of MAX5097BAUP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5097BAUP+T is usually 5 days.
3.What payment methods are accepted for MAX5097BAUP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5097BAUP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5097BAUP+T?
MAX5097BAUP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5097BAUP+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 MAX5097BAUP+T?
For technical support, including MAX5097BAUP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5097BAUP+T requirements.
6.How does Aetrix verify that MAX5097BAUP+T is sourced from the original manufacturer or authorized distributors?
All MAX5097BAUP+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 MAX5097BAUP+T meets industry standards.
7.What is the process for return or replacement of MAX5097BAUP+T?
All MAX5097BAUP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5097BAUP+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 MAX5097BAUP+T part is unused and in its original packaging.
Return procedure for MAX5097BAUP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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