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Analog Devices Inc./Maxim Integrated MAX8770GTL+
- Part No.:
- MAX8770GTL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
MAX8770GTL+.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,936
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Product details
Overview
The MAX8770GTL+ from Maxim Integrated is a dual-phase, Quick-PWM™ step-down controller designed for IMVP-6+ CPU core power supplies in notebook systems. It delivers ±0.4% output voltage accuracy over line, load, and temperature; supports 4V–26V battery input; implements true out-of-phase interleaving to reduce input/output ripple; and features active voltage positioning, programmable 200kHz–600kHz switching frequency, and integrated boost switches - enabling high-efficiency single-stage buck conversion directly from battery.
For engineers reviewing the MAX8770GTL+ datasheet, MAX8770GTL+ pinout, MAX8770GTL+ application, or MAX8770GTL+ equivalent, this page provides verified technical context, confirmed pin functions, real-world application scenarios for IMVP-6+ notebooks and blade servers, and validated alternative parts with documented functional differences.
Technical Context
The MAX8770GTL+ implements Intel IMVP-6+ VID code set and control signals, including DPRSTP, DPRSLPVR, PSI, and D0–D6 inputs. Its dual-phase architecture uses true differential current sensing (CSP_/CSN_) and dynamic phase selection to optimize efficiency across active/sleep states.
It integrates a slew-rate controller for controlled VID transitions, soft-start/shutdown, and suspend exit; a thermistor-based VRHOT thermal-fault output; and a POUT analog power monitor proportional to CPU power consumption. Protection includes UVP, OVP (MAX8770/MAX8771 only), and thermal shutdown at 160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Accuracy | ±0.4% over line/load/temperature - ensures stable CPU core voltage under dynamic load transients |
| Input Voltage Range | 4V to 26V battery-input range - enables direct buck from high-voltage Li-ion packs without pre-regulation |
| Switching Frequency | Programmable 200kHz to 600kHz - balances efficiency vs. size; higher frequencies reduce inductor/capacitor footprint |
| Current Sensing | True differential current sense (CSP_/CSN_) - enables precise per-phase current balance and valley current limiting |
| VID DAC Resolution | 7-bit on-board DAC (0V to +1.5000V) - supports full IMVP-6+ voltage codes with 12.5mV/µs slew-rate control |
| Protection Features | OVP (250–350mV FB threshold), UVP (−450 to −350mV), thermal shutdown (160°C), VRHOT fault - shuts down on critical faults to protect CPU and power stage |
| Gate Drivers | DH_ RON ≤ 2.5Ω, DL_ RON ≤ 0.5Ω - drives large synchronous rectifier MOSFETs with low conduction loss |
Pinout & Package
MAX8770GTL+ is housed in a 40-pin Thin QFN package (6mm × 6mm, 0.5mm pitch), thermally enhanced with exposed pad. Pin functions are validated per Maxim's official datasheet Rev 0 (10/05).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKEN | Clock Enable Output | Inverted logic signal indicating system clock readiness; used for proper startup sequencing of CPU and chipset |
| PWRGD | Power-Good Output | Open-drain indicator confirming regulated output voltage within ±150mV window - critical for CPU reset release |
| VRHOT | Thermal Fault Output | Active-low open-drain signal triggered when thermistor input (THRM) falls below 30% VCC - enables CPU thermal throttling |
| POUT | Power Monitor Output | Analog voltage (2.04–2.28V typical) proportional to CPU power - used for dynamic power management and telemetry |
| CSP_, CSN_ | Differential Current Sense Inputs | True differential pair for phase-current measurement - enables accurate droop control and current balancing between phases |
| D0–D6 | VID Code Inputs | 7-bit parallel interface accepting IMVP-6+ voltage identification codes - sets target output voltage dynamically |
| SHDN | Shutdown Input | Active-low enable; pulls internal circuitry into ultra-low ICC(SHDN) ≤ 1µA state - essential for system sleep modes |
| BST_, DH_, DL_, LX_ | Gate Drive & Power Stage Interface | BST_ charges high-side driver; DH_/DL_ drive external N-MOSFET gates; LX_ connects to inductor node - defines power stage topology |
Key Features
| Feature | Design Value |
|---|---|
| Quick-PWM™ Control | Provides instantaneous response to fast CPU load steps (e.g., 5A→36A in <1µs), minimizing output voltage deviation |
| Active Voltage Positioning | Adjustable gain (0.95–1.05 V/V) compensates for IR drop across PCB traces and bulk capacitors - improves regulation at CPU die |
| Transient Phase Overlap | Reduces required output capacitance by up to 30% during load transients - lowers BOM cost and board area |
| Integrated Boost Switches | Eliminates need for external bootstrap diode and capacitor - simplifies layout and improves reliability in high-duty-cycle operation |
| Dynamic Phase Selection | Automatically disables one phase during light loads - reduces switching losses and improves light-load efficiency by >15% |
| Programmable Slew Rate | RTIME resistor sets VID transition rate (5–25mV/µs) - prevents overshoot/undershoot during voltage scaling events |
Applications
| IMVP-6+ Notebook Core Supply | Blade Server CPU Power |
|---|---|
|
Use Scenario: High-performance ultrabook requiring dynamic voltage scaling from 0.65V to 1.50V based on CPU workload and thermal headroom. IC Role / Device Role / Timing Role: Dual-phase PWM controller executing IMVP-6+ protocol, managing VID decoding, phase shedding, and power-good sequencing. Use Value: Enables single-stage 12V–20V battery-to-core conversion with >90% peak efficiency and <15mV load transient deviation. |
Use Scenario: Dense 1U blade server with dual Xeon processors where thermal density demands precise per-core voltage positioning and thermal fault signaling. IC Role / Device Role / Timing Role: IMVP-6+ compliant controller providing VRHOT thermal fault output, POUT power telemetry, and synchronized dual-phase operation. Use Value: Reduces thermal derating via active voltage positioning and enables predictive thermal management using analog POUT feedback. |
| Voltage-Positioned Laptop Converters | High-Efficiency Mobile Workstations |
|
Use Scenario: Mobile workstation with discrete GPU and quad-core CPU sharing a common 19.5V adapter input, requiring tightly regulated core voltage with minimal bulk capacitance. IC Role / Device Role / Timing Role: Dual-phase buck controller implementing active droop compensation and differential current sensing for precise load-line control. Use Value: Cuts bulk output capacitance by 40% using tantalum/polymer caps while maintaining <±5mV regulation error under 20A load steps. |
Use Scenario: Ruggedized mobile workstation operating in extended temperature range (−40°C to +105°C) with strict power sequencing requirements. IC Role / Device Role / Timing Role: Controller delivering CLKEN, PWRGD, and soft-start timing with 20–100µs boot delay and 3–8ms PWRGD assertion after CLKEN. Use Value: Guarantees deterministic power-up sequence across industrial temperature range - eliminates CPU initialization failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase IMVP-6+ CPU power supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8771GTL+ | Includes PHASEGD output and CSN12 current-sense input; lacks true differential sense on CSN_ (uses single-ended CSN12) | Required where phase-good monitoring is mandatory for system-level fault logging or redundancy validation | Select MAX8771GTL+ only if PHASEGD signal is needed; otherwise MAX8770GTL+ offers superior current-sense accuracy via CSP_/CSN_ |
| RT8802CGQW | Single-phase controller with integrated MOSFET drivers; no VID support beyond IMVP-6; lacks POUT, VRHOT, and differential sense | Suitable for cost-sensitive, lower-power (<15A) CPU cores without IMVP-6+ telemetry or thermal fault requirements | Choose RT8802CGQW only for non-IMVP-6+-compliant designs or where system-level thermal management is handled externally |
Compared with MAX8771GTL+, the MAX8770GTL+ provides more accurate current balancing and voltage positioning but omits PHASEGD; compared with RT8802CGQW, it delivers full IMVP-6+ compliance, dual-phase capability, and integrated telemetry - making it the only validated option for high-end notebook CPU core supplies requiring VID-based dynamic scaling and thermal/power monitoring.
Availability
MAX8770GTL+ is available at Aetrix Electronics and suitable for notebook CPU core supplies, blade server power modules, and high-efficiency mobile workstations requiring stable component supply, long-term lifecycle support, and guaranteed IMVP-6+ compliance.
Supply support for MAX8770GTL+ 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 computing, communications, and industrial applications.
The MAX8770GTL+ belongs to Maxim's IMVP-6+ CPU power controller product line, engineered specifically to meet Intel's stringent voltage regulation, sequencing, and telemetry requirements for mobile and server-class processors.
FAQ
What is the maximum input voltage supported by the MAX8770GTL+?
The MAX8770GTL+ supports an input voltage range of 4V to 26V on its battery-input pins (e.g., VIN, BST_, LX_). This wide range allows direct buck conversion from multi-cell Li-ion batteries (e.g., 3S or 4S packs) without intermediate pre-regulation - a key requirement for high-efficiency notebook power architectures. Absolute maximum ratings confirm BST_ to GND withstands up to +36V, but continuous operation above 26V is not specified.
Does the MAX8770GTL+ include overvoltage protection (OVP)?
Yes, the MAX8770GTL+ includes output overvoltage protection with a trip threshold of 250mV to 350mV measured at the FB pin (rising edge), corresponding to ~1.75V–1.85V at nominal 1.2V output. When triggered, the controller immediately shuts down both phases. This OVP function is shared with the MAX8771GTL+ but omitted in the MAX8772GTL+, per Maxim's datasheet Rev 0 specifications.
How does the MAX8770GTL+ implement active voltage positioning?
The MAX8770GTL+ implements active voltage positioning via its GNDS pin and programmable gain amplifier. The GNDS input accepts a ground-referenced voltage offset (±200mV range), and the AGNDS gain (0.95–1.05 V/V) scales this offset to adjust output voltage inversely with load current - compensating for IR drop across PCB traces and bulk capacitors. This ensures tighter regulation precisely at the CPU die.
What is the purpose of the POUT pin on the MAX8770GTL+?
The POUT pin on the MAX8770GTL+ provides an analog voltage output proportional to CPU power consumption. With a typical gain of 1.72–1.88 V/V relative to feedback voltage error and 70–74 V/V relative to ΣV(CSP_,CSN), POUT delivers 2.04–2.28V under typical HFM conditions. System firmware uses this signal for dynamic power capping, thermal-aware frequency scaling, and energy telemetry - without requiring external ADCs or shunt monitors.
Can the MAX8770GTL+ operate in single-phase mode?
Yes, the MAX8770GTL+ supports dynamic single-phase operation via the DPRSLPVR pin. When DPRSLPVR is driven high, the controller automatically disables Phase 2 and operates in single-phase mode - reducing switching losses and improving light-load efficiency. This behavior is confirmed in the datasheet's "Dynamic Phase Selection" feature and validated in typical operating characteristics (TOC07, TOC04).
MAX8770GTL+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Quick-PWM™
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel IMVP-6+
- Voltage - Input:
- 4.5V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.013V ~ 1.5V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (6x6)
MAX8770GTL+ FAQ
1.How can I place an order for MAX8770GTL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8770GTL+ 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 MAX8770GTL+ reliable?
The price and inventory of MAX8770GTL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8770GTL+ is usually 5 days.
3.What payment methods are accepted for MAX8770GTL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8770GTL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8770GTL+?
MAX8770GTL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8770GTL+ 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 MAX8770GTL+?
For technical support, including MAX8770GTL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8770GTL+ requirements.
6.How does Aetrix verify that MAX8770GTL+ is sourced from the original manufacturer or authorized distributors?
All MAX8770GTL+ 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 MAX8770GTL+ meets industry standards.
7.What is the process for return or replacement of MAX8770GTL+?
All MAX8770GTL+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8770GTL+, 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 MAX8770GTL+ part is unused and in its original packaging.
Return procedure for MAX8770GTL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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