My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1718EEI+
- Part No.:
- MAX1718EEI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- -
- Datasheet:
-
MAX1718EEI+.pdf
- Description:
- IC CTRLR CPU FOR IMVP-II 28QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,125
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1718EEI+ from Maxim Integrated is a notebook CPU step-down controller implementing Intel Mobile Voltage Positioning (IMVP-II) for core power delivery. It delivers dynamically adjustable 0.6V–1.75V output, ±1% DC accuracy, ultra-fast 100ns load transient response via Quick-PWM™ constant-on-time control, and supports single-stage buck conversion from 2V–28V battery input - used in high-efficiency CPU core supplies for 2–4 cell Li+ notebooks.
For engineers reviewing the MAX1718EEI+ datasheet, MAX1718EEI+ pinout, MAX1718EEI+ application, or MAX1718EEI+ equivalent, key selection criteria include IMVP-II compliance, VID DAC slew-rate control, voltage-positioning offset capability, 28-pin QSOP package compatibility, and support for 200/300/550/1000kHz switching frequencies with external TON pin-strapping.
Technical Context
The MAX1718EEI+ implements a feed-forward, constant-on-time PWM architecture where DH on-time is inversely proportional to V+ (2V–28V) and directly proportional to VOUT + 0.075V, enabling near-constant frequency across wide input/output ratios. Its internal 5-bit VID DAC accepts three mode-selectable codes (Performance, Battery, Suspend) via ZMODE/SUS multiplexer logic.
Voltage positioning is achieved through precision POS/NEG differential inputs scaling output by a DAC-dependent factor (0.81–0.91 V/V), reducing required output capacitance. The controller drives large synchronous FETs with DH/ DL gate drivers featuring 1.0–3.5Ω on-resistance and 1.6A/4A source/sink capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.6V to 1.75V - digitally programmable via 5-bit VID DAC for IMVP-II CPU core regulation. |
| DC Output Accuracy | ±1% over line/load - ensures tight CPU VDD tolerance without external calibration. |
| Battery Input Range | 2V to 28V - supports direct buck from 2–4 cell Li+ batteries or 5V system rail. |
| Switching Frequency | 200/300/550/1000kHz - selectable via TON pin strap; enables trade-off between size, efficiency, and EMI. |
| Load Transient Response | 100ns "instant-on" - Quick-PWM™ architecture minimizes output droop during CPU burst loads. |
| Voltage Positioning Gain | 0.81–0.91 V/V - scales output based on POS–NEG differential to reduce capacitor count and system power loss. |
| Quiescent Supply Current | 700µA (VCC), <1µA shutdown - enables low-power suspend-mode operation in mobile platforms. |
Pinout & Package
MAX1718EEI+ is housed in a 28-pin QSOP package (7.6mm × 10.2mm, 1.0mm height), optimized for space-constrained notebook motherboard layouts and compatible with standard surface-mount reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Battery input sense | Provides input voltage feedback for on-time calculation; operates from 2V–28V. |
| DH | High-side gate driver output | Drives synchronous rectifier FET gate referenced to LX; 1.6A source/3.5Ω on-resistance. |
| DL | Low-side gate driver output | Drives synchronous FET gate referenced to GND; 4A sink/1.0Ω on-resistance. |
| FB | Feedback input | Connects to output node; regulates voltage using internal error amplifier and VID DAC reference. |
| POS / NEG | Voltage-positioning differential inputs | Enable IR-drop compensation or active voltage positioning; scale output by DAC-dependent gain (0.81–0.91). |
| TON | On-time selection control | 4-level input (GND/REF/open/VCC) sets K-factor for 1000/550/300/200kHz nominal switching frequency. |
| ZMODE / SUS | VID multiplexer control | Selects between Performance/Battery/Suspend VID codes; enables dynamic CPU power-state transitions. |
| SKP/SDN | Combined shutdown/skip-mode | GND = shutdown; open = forced PWM; VCC = pulse-skipping; >12V disables OVP/UVP. |
Key Features
| Feature | Design Value |
|---|---|
| Quick-PWM™ architecture | Constant-on-time control with input feed-forward enables stable operation across 2V–28V input while maintaining ~100ns transient response. |
| 5-bit VID DAC with mux | Three independent 5-bit codes (D0–D4) for Performance, Battery, and Suspend modes - synchronized to slew clock for clean transitions. |
| Precision slew-rate control | Adjustable TIME pin (38–380kHz clock) governs DAC code transition speed to minimize battery surge currents during mode changes. |
| Voltage-positioning interface | POS/NEG differential pair provides programmable output scaling (0.81–0.91×) to reduce output capacitor requirements and total power dissipation. |
| Offset control inputs | Compensates for PCB trace IR drop by injecting precise offset into feedback loop - critical for accurate remote sensing in dense layouts. |
Applications
| IMVP-II Notebook CPU Core Supply | 2–4 Cell Li+ Battery Direct Buck |
|---|---|
Use Scenario: Powering Intel Pentium M/Core Solo/Core Duo CPU cores in ultraportable notebooks requiring dynamic voltage scaling and aggressive power management. IC Role / Device Role / Timing Role: IMVP-II-compliant step-down controller generating dynamically adjusted 0.6V–1.75V core voltage with VID code sequencing and voltage positioning. Use Value: Enables full compliance with Intel's Mobile Voltage Positioning specification, including precise 100ns load-step response and seamless performance/battery/suspend mode transitions. | Use Scenario: Converting unregulated 2–4 cell Li+ battery (7V–24V) directly to CPU core voltage in space-constrained designs where 5V rail is unavailable or inefficient. IC Role / Device Role / Timing Role: Primary buck controller operating in single-stage configuration with V+ input sensing and high-efficiency synchronous rectification drive. Use Value: Eliminates intermediate 5V conversion stage, improving overall system efficiency by up to 3–5% and reducing component count and board area. |
| 5V System Rail to CPU Core | Voltage-Positioned Power Supply |
Use Scenario: Generating CPU core voltage from stable 5V system supply in docking stations or desktop-replacement notebooks where battery input is bypassed. IC Role / Device Role / Timing Role: High-frequency (up to 1000kHz) buck controller using 5V bias (VCC/VDD) and V+ tied to 5V - enabling minimal inductor/capacitor size. Use Value: Achieves smallest possible solution footprint with 300kHz+ operation, supporting <10mm² total passive area while maintaining ±1% regulation accuracy. | Use Scenario: Implementing voltage positioning in high-current CPU VRMs to reduce output capacitance and improve transient recovery without sacrificing regulation accuracy. IC Role / Device Role / Timing Role: Precision offset-controlled buck controller using POS/NEG differential inputs to actively adjust output setpoint based on load current estimation. Use Value: Reduces required bulk capacitance by ≥30% and lowers total system power dissipation via adaptive output voltage droop under load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar notebook CPU step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1719EEI+ | Same IMVP-II architecture and pinout; adds integrated 2V reference buffer and enhanced thermal shutdown hysteresis. | Preferred for new designs requiring tighter REF stability and improved thermal fault margin in high-density layouts. | Drop-in replacement with identical VID timing and voltage positioning behavior; no layout change needed. |
| ISL6260CRZ | Intersil IMVP-IV controller; supports higher 0.5–1.5V range, faster 200ns transient response, and dual-phase capability. | Targets newer Intel Core 2 Duo platforms requiring IMVP-IV compliance and multi-phase scalability. | Not pin-compatible; requires redesign of VID interface, gate drive, and feedback network - suitable only for next-generation upgrades. |
Compared with MAX1719EEI+, the MAX1718EEI+ lacks buffered REF output but offers identical IMVP-II timing and voltage positioning functionality; versus ISL6260CRZ, it is limited to single-phase IMVP-II and cannot support IMVP-IV or dual-phase topologies - making MAX1718EEI+ optimal for cost-sensitive, legacy Intel mobile CPU designs.
Availability
MAX1718EEI+ is available at Aetrix Electronics and suitable for notebook CPU core power supplies, IMVP-II-compliant mobile platforms, and voltage-positioned VRM designs requiring stable component supply and long-term industrial availability.
Supply support for MAX1718EEI+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for computing, communications, and industrial applications.
The MAX1718 product line was designed specifically for Intel IMVP-II notebook CPU core power delivery, emphasizing fast transient response, voltage positioning, and seamless VID mode transitions in battery-powered mobile systems.
FAQ
What is the function of the TIME pin on the MAX1718EEI+?
The TIME pin on the MAX1718EEI+ sets the internal slew-rate clock frequency (38–380kHz) by connecting an external resistor to GND. This controls the speed of VID DAC code transitions between Performance, Battery, and Suspend modes - preventing excessive surge currents during dynamic CPU voltage changes. The MAX1718EEI+ uses this clock to synchronize DAC updates and ensure "just-in-time" arrival at target output voltages.
Does the MAX1718EEI+ support both battery-input and 5V-input configurations?
Yes, the MAX1718EEI+ supports both configurations: V+ accepts 2V–28V battery input for direct buck conversion, while VCC and VDD require a separate 4.5V–5.5V bias supply. When powered from a fixed 5V rail, V+ and VDD may be tied together. The MAX1718EEI+ maintains full functionality - including Quick-PWM™ timing and VID mode selection - in either topology, with no circuit modification required.
How does voltage positioning work on the MAX1718EEI+?
Voltage positioning on the MAX1718EEI+ is implemented via the POS and NEG differential inputs, which scale the output voltage by a DAC-dependent factor (0.81–0.91 V/V). The difference (POS – NEG) is multiplied by this gain and added to the DAC-set base voltage - enabling intentional output droop under load to reduce required output capacitance and system power loss. This feature is fully supported in the MAX1718EEI+ and requires no additional ICs or firmware.
What are the shutdown current specifications for the MAX1718EEI+?
In shutdown mode (SKP/SDN = GND), the MAX1718EEI+ draws ≤5µA from VCC, ≤5µA from VDD, and ≤5µA from V+ - ensuring minimal battery drain during system suspend. These values are guaranteed over the full –40°C to +85°C operating temperature range and are measured with all other pins at specified logic levels. The MAX1718EEI+ achieves this ultra-low shutdown current without external circuitry.
Can the MAX1718EEI+ drive large MOSFETs directly?
Yes, the MAX1718EEI+ integrates robust gate drivers: DH provides 1.6A source/3.5Ω on-resistance, and DL provides 4A sink/1.0Ω on-resistance - sufficient to drive large synchronous rectifier FETs (e.g., IRF7811A, FDS7764A) without external buffers. The MAX1718EEI+ also includes VGATE blanking during transitions and BST bootstrap management to ensure reliable high-side switching across its full 2V–28V input range.
MAX1718EEI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Product Status:
- Obsolete
- Applications:
- -
- Voltage - Input:
- -
- Number of Outputs:
- -
- Voltage - Output:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX1718EEI+ FAQ
1.How can I place an order for MAX1718EEI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1718EEI+ 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 MAX1718EEI+ reliable?
The price and inventory of MAX1718EEI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1718EEI+ is usually 5 days.
3.What payment methods are accepted for MAX1718EEI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1718EEI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1718EEI+?
MAX1718EEI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1718EEI+ 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 MAX1718EEI+?
For technical support, including MAX1718EEI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1718EEI+ requirements.
6.How does Aetrix verify that MAX1718EEI+ is sourced from the original manufacturer or authorized distributors?
All MAX1718EEI+ 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 MAX1718EEI+ meets industry standards.
7.What is the process for return or replacement of MAX1718EEI+?
All MAX1718EEI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1718EEI+, 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 MAX1718EEI+ part is unused and in its original packaging.
Return procedure for MAX1718EEI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1718EEI+ Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
