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Analog Devices Inc./Maxim Integrated MAX1632EAI-TG074
- Part No.:
- MAX1632EAI-TG074
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1632EAI-TG074.pdf
- Description:
- IC REG LINEAR LOW NOISE PWR SUP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
MAX1632EAI-TG074 from Maxim Integrated is a dual-output, buck-topology power-supply controller for notebook/subnotebook systems, generating 3.3V and 5V logic supplies from +4.2V to +30V input. It integrates synchronous rectification, 200kHz/300kHz fixed-frequency PWM, digital soft-start, power-good signaling with 32,000-cycle delay, and a 12V/120mA linear regulator. Designed for battery-powered mobile computing, it delivers >96% peak efficiency and >80% efficiency across 1000:1 load range.
For engineers reviewing the MAX1632EAI-TG074 datasheet, MAX1632EAI-TG074 pinout, MAX1632EAI-TG074 application, or MAX1632EAI-TG074 equivalent, key selection criteria include its dual adjustable/fixed output capability (2.5V–5.5V), integrated 12V linear regulator, -40°C to +85°C extended temperature grade, 28-pin SSOP package, and secondary feedback support for auxiliary flyback winding regulation.
Technical Context
The MAX1632EAI-TG074 implements two independent current-mode PWM controllers with Dual Mode™ feedback-supporting both fixed (3.3V/5V) and adjustable (2.5V–5.5V) outputs via FB3/FB5 pins. Its Idle Mode™ control dynamically reduces switching frequency under light load to maintain >80% efficiency down to 1mA, while SKIP pin forces fixed-frequency operation for EMI-sensitive applications.
It features on-chip 1A gate drivers for external N-channel MOSFETs, automatic VL bootstrapping from the 5V SMPS output when >4.5V, internal frequency compensation, and comprehensive fault protection including output overvoltage/undervoltage lockout (OVP/UVP) and thermal shutdown at 150°C. The device uses a shared oscillator and supports external synchronization via SYNC pin (240–350kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +4.2V to +30V - supports wide battery input including Li-ion stacks and adapter rails. |
| Output Voltages | 3.3V fixed / 5.0V fixed / 2.5V–5.5V adjustable - selectable per channel via FBx pin configuration. |
| Oscillator Frequency | 200kHz or 300kHz (pin-selectable via SYNC) - enables noise optimization and inductor size tradeoffs. |
| Peak Efficiency | 96% - achieved via synchronous rectification and optimized gate drive timing. |
| 12V Linear Regulator | 12V/120mA - powered from VDD, supports auxiliary flyback-derived supply for RTC or interface rails. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended-temperature notebook environments. |
| Quiescent Power | 2.5mW typical (+12V input, both SMPS on) - extends battery life in suspend/standby states. |
Pinout & Package
MAX1632EAI-TG074 is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, JEDEC MO-153 compliant, and lead-free (RoHS-compliant) construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB3 | 3.3V SMPS Feedback Input | Dual Mode™ pin: tied to GND for 3.3V fixed output; connected to resistor divider for 2.5V–5.5V adjustable regulation. |
| FB5 | 5V SMPS Feedback Input | Dual Mode™ pin: tied to GND for 5.0V fixed output; connected to resistor divider for 2.5V–5.5V adjustable regulation. |
| CSH3/CSL3 | 3.3V Current Sense Inputs | CSH3 = high-side sense; CSL3 = low-side sense & fixed-mode feedback node; 100mV current-limit threshold referenced to CSL3. |
| CSH5/CSL5 | 5V Current Sense Inputs | CSH5 = high-side sense; CSL5 = low-side sense, bootstrap supply, and fixed-mode feedback node. |
| VL | 5V Internal Linear Regulator Output | Supplies IC core logic and gate drivers; auto-switches from internal LDO to 5V SMPS output when >4.5V (bootstrapping). |
| 12OUT | 12V Linear Regulator Output | 12V/120mA output sourced from VDD; requires 1µF bypass capacitor; used for auxiliary rails (e.g., RTC, USB PHY). |
| RESET | Active-Low Timed Reset Output | Asserts low for 32,000 oscillator cycles after power-up; synchronized to SMPS readiness for system reset sequencing. |
| SEQ | Power-Up Sequence Control | Pin-strapped: GND = 5V before 3.3V; REF = independent ON3/ON5 control; VL = 3.3V before 5V. |
| SKIP | Idle Mode Disable Input | Logic-high disables pulse-skipping; forces fixed-frequency PWM for lowest EMI in pen-entry or RF-critical applications. |
| SECFB | Secondary Feedback Input | Regulates auxiliary flyback winding at 2.5V; tied to VL if unused; enables quasi-regulated 12V generation without dedicated transformer winding. |
| DH3/DL3 | 3.3V High/Low-Side Gate Drivers | DH3 = floating driver (LX3–BST3); DL3 = grounded driver (0V–VL); each capable of 1A sink/source. |
| DH5/DL5 | 5V High/Low-Side Gate Drivers | DH5 = floating driver (LX5–BST5); DL5 = grounded driver (0V–VL); each capable of 1A sink/source. |
| V+ | Main Input Supply | +4.2V to +30V battery/adapter input; bypassed to PGND with 0.22µF ceramic capacitor near IC. |
| PGND | Power Ground | Separate ground return for high-current SMPS paths; must be routed separately from analog GND. |
| GND | Analog Ground | Low-noise reference for REF, FB3/FB5, and error amplifiers; tied to PGND at single point. |
| REF | 2.5V Precision Reference Output | 2.5V ±3% (2.42–2.58V), 100µA max load; used as feedback reference for both SMPS channels. |
| RUN/ON3 | 3.3V SMPS Enable Input | Active-high logic control; enables 3.3V output independently when SEQ = REF. |
| TIME/ON5 | 5V SMPS Enable & Timing Pin | Active-high enable for 5V output when SEQ = REF; also sets soft-start time via external capacitor. |
| SHDN | Global Shutdown Input | Active-low; <1V threshold; pulls V+ supply current to 4µA typical in shutdown mode. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Feedback | Single pin (FB3/FB5) selects fixed 3.3V/5.0V or adjustable 2.5V–5.5V output without external op-amps. |
| Idle Mode™ Control | Automatically switches between pulse-skipping (light load) and fixed-frequency PWM (heavy load) to sustain >80% efficiency from 1mA to full load. |
| Integrated 12V Linear Regulator | 12V/120mA output derived from VDD; eliminates need for discrete LDO in auxiliary rail generation (e.g., RTC, USB). |
| Programmable Power-Up Sequence | Three sequence options (3.3V-first, 5V-first, or independent control) set by SEQ pin voltage-ensures safe core/peripheral power sequencing. |
| Secondary Feedback Regulation | SECFB pin regulates auxiliary flyback winding at 2.5V; enables precise 12V generation from coupled inductor without optocoupler or TL431. |
| On-Chip 1A Gate Drivers | Strong drivers reduce external component count and ensure fast N-MOSFET switching; DHx outputs support bootstrap operation up to 36V. |
Applications
| Mobile Computing Power Management | Notebook CPU Core Supply |
|---|---|
Use Scenario: Powering 3.3V I/O and 5V peripheral rails in subnotebook platforms with Li-ion battery input (7.2V–12.6V). IC Role / Device Role / Timing Role: Dual-output buck controller managing sequential power-up, soft-start, and RESET assertion aligned to SMPS stabilization. Use Value: Eliminates discrete sequencing ICs and external LDOs; achieves 96% efficiency at 2A load and 85% at 10mA, extending runtime in suspend mode. | Use Scenario: Generating local 5V and 3.3V supplies for CPU voltage regulator modules (VRMs) and chipset I/O in thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary SMPS controller delivering fast transient response (<5 cycles @300kHz) to dynamic-clock CPUs during burst activity. Use Value: Maintains <±1% output regulation during 1A/µs load steps; reduces required output capacitance by 30% vs. non-synchronous designs. |
| Auxiliary Flyback Power Supply | Industrial Portable Instrumentation |
Use Scenario: Deriving isolated 12V auxiliary rail from main 3.3V/5V inductor using coupled winding and SECFB feedback. IC Role / Device Role / Timing Role: Secondary feedback regulator using SECFB pin to close loop on flyback winding, eliminating optocoupler and TL431. Use Value: Achieves ±3% 12V regulation across line/load/temperature; reduces BOM cost by $0.35 and PCB area by 25mm² vs. discrete solution. | Use Scenario: Providing stable 3.3V/5V/12V rails in handheld test equipment operating from 9V alkaline or 12V LiFePO₄ battery packs. IC Role / Device Role / Timing Role: Extended-temperature (-40°C to +85°C) power controller supporting cold-weather field deployment and battery standby for >6 months. Use Value: Delivers 4µA shutdown current and 2.5mW quiescent power-enabling >180-day battery life in sleep mode with no external disable circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-output buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1635EAI+ | Same pinout, identical feature set, but includes STEER pin for secondary feedback routing to either 3.3V or 5V SMPS; MAX1632 lacks STEER. | Required when secondary feedback must be steered to 5V SMPS (e.g., 5V-based flyback design); MAX1632 only supports fixed 3.3V-steered SECFB. | Select MAX1635EAI+ if flexible SECFB routing is needed; otherwise MAX1632EAI-TG074 suffices for 3.3V-steered auxiliary supplies. |
| TPS54386PWPR | Single-output (3.3V or 5V), no 12V LDO, no SECFB, no dual-mode feedback; 20-pin HTSSOP vs. 28-pin SSOP. | Suitable only for single-rail applications; cannot replace MAX1632EAI-TG074 in dual-output + 12V auxiliary configurations without redesign. | Use TPS54386PWPR only when simplifying to one regulated output; not a functional substitute for MAX1632EAI-TG074's integrated multi-rail architecture. |
Compared with MAX1635EAI+, the MAX1632EAI-TG074 omits STEER functionality but retains identical dual SMPS control, 12V LDO, and SECFB-making it optimal for fixed 3.3V-steered flyback topologies. Versus TPS54386PWPR, it provides true multi-output integration, eliminating three discrete regulators and reducing layout complexity by 40%.
Availability
MAX1632EAI-TG074 is available at Aetrix Electronics and suitable for notebook computers, subnotebook systems, and portable instrumentation requiring stable component supply with extended temperature support and long-term lifecycle assurance.
Supply support for MAX1632EAI-TG074 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 industrial, computing, and communications markets.
The MAX1630–MAX1635 family was designed specifically for multi-rail, low-noise DC-DC conversion in battery-powered mobile computing-emphasizing efficiency across ultra-wide load ranges, programmable sequencing, and integrated auxiliary regulation.
FAQ
What is the maximum input voltage rating for the MAX1632EAI-TG074?
The MAX1632EAI-TG074 has an absolute maximum input voltage (V+) rating of +36V, with recommended continuous operation from +4.2V to +30V. Exceeding +36V may cause permanent damage. The device includes internal overvoltage clamping on VDD (18V) and robust gate-drive level-shifting to support high-side MOSFET operation even at 30V input.
Does the MAX1632EAI-TG074 support both fixed and adjustable output voltages?
Yes, the MAX1632EAI-TG074 supports both fixed and adjustable outputs via its Dual Mode™ architecture. Connecting FB3 or FB5 to GND configures 3.3V or 5.0V fixed output, respectively; connecting them to resistor dividers enables 2.5V–5.5V adjustable regulation. This flexibility allows one IC to serve multiple board variants without hardware changes.
How does the MAX1632EAI-TG074 achieve high efficiency at light loads?
The MAX1632EAI-TG074 achieves >80% efficiency down to 1mA using Idle Mode™-a proprietary pulse-skipping technique that reduces effective switching frequency under light load. When SKIP = low, the controller skips cycles while maintaining peak inductor current above 25% of full-scale limit, minimizing gate-charge and transition losses without compromising regulation.
Can the MAX1632EAI-TG074 generate a 12V output without an external transformer winding?
No-the 12V output (12OUT) is a linear regulator powered from VDD, which itself is derived from a flyback winding on the main inductor. The MAX1632EAI-TG074 requires a coupled inductor with auxiliary winding to generate VDD; SECFB then regulates that winding to 2.5V, enabling precise 12V output. No transformer is needed only if VDD is supplied externally-but that defeats the integrated flyback function.
What is the purpose of the SEQ pin on the MAX1632EAI-TG074?
The SEQ pin on the MAX1632EAI-TG074 controls power-up sequencing: tying SEQ to GND powers 5V before 3.3V; tying to REF enables independent ON3/ON5 control; tying to VL powers 3.3V before 5V. This ensures safe voltage ramping for processors and peripherals, preventing latch-up or undefined logic states during startup-critical in x86 and ARM-based notebook designs.
MAX1632EAI-TG074 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Controller, Notebook Power System
- Voltage - Input:
- 4.2V ~ 30V
- Number of Outputs:
- 2
- Voltage - Output:
- 2.5V ~ 3.3V, 5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
MAX1632EAI-TG074 FAQ
1.How can I place an order for MAX1632EAI-TG074 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1632EAI-TG074 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 MAX1632EAI-TG074 reliable?
The price and inventory of MAX1632EAI-TG074 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1632EAI-TG074 is usually 5 days.
3.What payment methods are accepted for MAX1632EAI-TG074?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1632EAI-TG074 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1632EAI-TG074?
MAX1632EAI-TG074 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1632EAI-TG074 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 MAX1632EAI-TG074?
For technical support, including MAX1632EAI-TG074 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1632EAI-TG074 requirements.
6.How does Aetrix verify that MAX1632EAI-TG074 is sourced from the original manufacturer or authorized distributors?
All MAX1632EAI-TG074 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 MAX1632EAI-TG074 meets industry standards.
7.What is the process for return or replacement of MAX1632EAI-TG074?
All MAX1632EAI-TG074 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1632EAI-TG074, 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 MAX1632EAI-TG074 part is unused and in its original packaging.
Return procedure for MAX1632EAI-TG074:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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