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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Supply Controllers, Monitors

Analog Devices Inc./Maxim Integrated MAX1964TEEE

Name: MAX1964TEEE
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX1964TEEE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX1964TEEE

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Power Supply Controllers, Monitors

Package:: 16-SSOP (0.154", 3.90mm Width)

Datasheet:: MAX1964TEEE.pdf

Description:: POWER-SUPPLY CONTROLLER

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Product details

Overview

MAX1964TEEE from Maxim Integrated is a triple-output tracking/sequencing power-supply controller IC featuring a synchronous step-down DC-DC controller (preset 3.3V or adjustable 1.236V–0.75×VIN), two positive analog gain blocks for auxiliary linear regulators, and voltage sequencing during startup. It operates from 4.5V to 28V input, delivers up to 95% efficiency at 200kHz, and eliminates current-sense resistors via MOSFET R_DS(ON)-based sensing - used in cable modem and set-top box power systems.

For engineers reviewing the MAX1964TEEE datasheet, MAX1964TEEE pinout, MAX1964TEEE application, or MAX1964TEEE equivalent, key selection criteria include its 16-pin QSOP package, integrated 5V VL regulator, dual-mode feedback (preset/adjustable), valley-current limiting with ILIM pin control, and sequencing behavior across three regulated outputs without external timing components.

Technical Context

The MAX1964TEEE implements current-mode PWM control with slope compensation for stable loop response and fast line/load transient performance. Its main controller senses inductor current via high-side MOSFET R_DS(ON), while valley-current limiting uses low-side MOSFET R_DS(ON) - both eliminating discrete sense resistors. The internal 5V VL LDO powers gate drivers and bias circuitry, and enables soft-start via internal ramp.

Voltage sequencing is hardware-defined: FB rising triggers B2 turn-on at 1.145V, then FB2 rising triggers B3 turn-on at same threshold - establishing fixed-order startup of three output rails. All gain blocks (FB2/FB3) reference 1.24V internal setpoint and drive external PNP pass transistors for low-noise, low-cost linear regulation derived from the main converter output.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 28V - supports unregulated wall adapters and wide-input industrial supplies without pre-regulation.
Switching Frequency	200kHz (±40kHz) - enables use of low-cost aluminum electrolytic output capacitors and standard power magnetics.
Main Output Voltage	Preset 3.34V (±1.5%) or adjustable 1.236V–0.75×VIN - flexible for DDR, core, or I/O rail generation with external resistor divider.
Feedback Reference Voltage	1.236V (±1.2%) at FB pin - defines output regulation point in adjustable mode; enables accurate scaling with minimal resistor tolerance impact.
Current-Limit Threshold	250mV (internal default) or adjustable 106–530mV via ILIM pin - sets peak inductor current limit without external sense resistor, supporting wide R_DS(ON) MOSFET selection.
VL Regulator Output	5.00V ±2.5%, 50mA max - powers internal circuitry and external boost diode/capacitor; short-circuit protected for ≤100ms.
Power-Good Accuracy	±3% hysteresis on FB trip (1.114V) and ±3% on POK output - ensures reliable system enable/disable sequencing across all three outputs.

Pinout & Package

MAX1964TEEE is housed in a 16-pin QSOP (Quad Small Outline Package) with 0.154" body width and 0.025" lead pitch. Thermal pad is not present; power dissipation is limited to 666mW at +70°C ambient.

Pin	Circuit Role	Design Meaning
1 (POK)	Open-drain power-good indicator	Asserts low if any output deviates >10% from regulation; requires pull-up to VL for logic-level interface with microcontrollers or FPGA configuration logic.
2 (COMP)	Control loop compensation node	Connects external RC network to GND to stabilize current-mode PWM loop; critical for transient response and phase margin in varying load conditions.
3 (OUT)	Main output voltage sense input	High-impedance connection to main converter output; internally tied to resistive divider for preset mode or used as feedback reference in adjustable configurations.
4 (FB)	Dual-mode feedback input	Grounded for 3.3V preset; connected to resistive divider for adjustable output - sets regulation point at 1.236V with <100nA leakage.
5 (B2)	PNP base-drive output (Regulator 2)	Open-drain DMOS driver sinking up to 24mA; controls external PNP transistor to generate second positive rail (e.g., 2.5V from 3.3V main output).
6 (FB2)	Gain block 2 feedback input	Sets second regulator output voltage via resistive divider to GND; 1.24V internal reference enables precise 1.8V/2.5V/3.3V auxiliary rails.
7 (B3)	PNP base-drive output (Regulator 3)	Second open-drain driver for third positive rail; sequenced after B2 activation, enabling controlled startup order for multi-rail systems.
8 (FB3)	Gain block 3 feedback input	Third regulation node with same 1.24V reference; allows independent adjustment of third output (e.g., 1.8V for memory I/O) without affecting others.
9 (ILIM)	Current-limit threshold adjust	Accepts 0.5–2.5V input to scale valley-current limit from 106mV to 530mV; default 250mV when tied to VL.
10 (GND)	Analog and power ground reference	Single ground pin for all internal circuits; requires low-inductance PCB connection to minimize noise coupling into current-sense paths.
11 (DL)	Low-side gate-driver output	Swings between GND and VL (5V); drives N-channel MOSFET source-connected to LX with controlled dead time to prevent shoot-through.
12 (LX)	Inductor switch node	Connects to inductor and low-side MOSFET drain; used for current sensing via R_DS(ON) and as return path for valley-current limit detection.
13 (DH)	High-side gate-driver output	Swings between LX and BST (≈VL+5V); drives N-channel high-side MOSFET gate with 0.7Ω typical on-resistance and 0.5A drive strength.
14 (BST)	Boost capacitor connection	Connects external flying capacitor (0.1µF ceramic) and bootstrap diode to generate gate-drive voltage above LX for high-side FET.
15 (VL)	Internal 5V linear regulator output	Supplies internal bias, DL driver, and external BST circuitry; bypassed with ≥1µF ceramic capacitor to ensure stability under dynamic load.
16 (IN)	Main input supply	4.5–28V unregulated input; requires ≥1µF ceramic bypass close to pin to suppress high-frequency switching noise and support peak current delivery.

Key Features

Feature	Design Value
No current-sense resistor required	Uses high-side MOSFET R_DS(ON) for current sensing and low-side R_DS(ON) for valley-current limiting - reduces BOM cost and board space by eliminating two precision resistors.
Hardware-defined voltage sequencing	Fixed startup order: main output → B2/FB2 rail → B3/FB3 rail, triggered by internal 1.145V thresholds - ensures safe power-up of processors, memory, and peripherals without external controllers.
Dual-mode feedback (preset/adjustable)	Single FB pin supports either grounded preset (3.3V) or resistor-divider adjustable mode (1.236V reference) - simplifies design reuse across multiple output voltage requirements.
Integrated 5V VL LDO	Self-contained 5V/50mA regulator powers internal logic and external gate-drive circuitry - eliminates need for separate bias supply and improves system integration density.
200kHz fixed-frequency PWM	Enables predictable EMI filtering and compatibility with low-cost magnetics and aluminum electrolytic capacitors - reduces total solution cost in cost-sensitive CPE applications.

Applications

Cable Modem Power System	Set-Top Box Multi-Rail Supply
Use Scenario: Provides three regulated rails (3.3V, 2.5V, 1.8V) from single unregulated 12V wall adapter in DOCSIS-compliant cable modems. IC Role / Device Role / Timing Role: Main DC-DC controller with sequencing logic and analog gain blocks - manages startup order, load regulation, and cross-talk isolation between RF, MAC, and memory subsystems. Use Value: Eliminates discrete sequencing IC and three LDOs, reducing component count by ≥7 parts while maintaining ±1.5% output accuracy across temperature.	Use Scenario: Generates 3.3V (core), 2.5V (I/O), and 1.8V (DDR) from 9–18V input in satellite/cable STBs with strict startup timing requirements. IC Role / Device Role / Timing Role: Triple-output power manager with hardware-based sequencing - ensures processor core powers before I/O, and I/O before memory to prevent latch-up or initialization faults. Use Value: Achieves <200µs sequencing window between rails using internal thresholds - no firmware or external timers needed, improving boot reliability and reducing qualification effort.
xDSL Customer Premise Equipment	Wireless Local Loop Base Station
Use Scenario: Powers ADSL2+ line card with 3.3V analog front-end, 2.5V PHY, and 1.8V digital logic from 12V/24V telecom input. IC Role / Device Role / Timing Role: Primary power controller with R_DS(ON)-based current sensing - handles wide input range and provides stable outputs under bursty DSL line loading. Use Value: 95% peak efficiency at full load reduces thermal stress in sealed enclosures; valley-current limiting prevents MOSFET failure during short-circuit events on any rail.	Use Scenario: Supplies 3.3V (baseband processor), 2.5V (RF synthesizer), and 1.8V (ADC/DAC) in outdoor WLL units operating from 24V PoE-derived input. IC Role / Device Role / Timing Role: Sequencing power controller with integrated VL LDO - powers internal gate drivers and external boost circuit while coordinating rail enable timing. Use Value: Internal 5V VL regulator eliminates need for external bias supply, simplifying layout and improving immunity to input ripple in noisy RF environments.

Cable Modem Power System

Set-Top Box Multi-Rail Supply

Use Scenario: Provides three regulated rails (3.3V, 2.5V, 1.8V) from single unregulated 12V wall adapter in DOCSIS-compliant cable modems.

IC Role / Device Role / Timing Role: Main DC-DC controller with sequencing logic and analog gain blocks - manages startup order, load regulation, and cross-talk isolation between RF, MAC, and memory subsystems.

Use Value: Eliminates discrete sequencing IC and three LDOs, reducing component count by ≥7 parts while maintaining ±1.5% output accuracy across temperature.

Use Scenario: Generates 3.3V (core), 2.5V (I/O), and 1.8V (DDR) from 9–18V input in satellite/cable STBs with strict startup timing requirements.

IC Role / Device Role / Timing Role: Triple-output power manager with hardware-based sequencing - ensures processor core powers before I/O, and I/O before memory to prevent latch-up or initialization faults.

Use Value: Achieves <200µs sequencing window between rails using internal thresholds - no firmware or external timers needed, improving boot reliability and reducing qualification effort.

xDSL Customer Premise Equipment

Wireless Local Loop Base Station

Use Scenario: Powers ADSL2+ line card with 3.3V analog front-end, 2.5V PHY, and 1.8V digital logic from 12V/24V telecom input.

IC Role / Device Role / Timing Role: Primary power controller with R_DS(ON)-based current sensing - handles wide input range and provides stable outputs under bursty DSL line loading.

Use Value: 95% peak efficiency at full load reduces thermal stress in sealed enclosures; valley-current limiting prevents MOSFET failure during short-circuit events on any rail.

Use Scenario: Supplies 3.3V (baseband processor), 2.5V (RF synthesizer), and 1.8V (ADC/DAC) in outdoor WLL units operating from 24V PoE-derived input.

IC Role / Device Role / Timing Role: Sequencing power controller with integrated VL LDO - powers internal gate drivers and external boost circuit while coordinating rail enable timing.

Use Value: Internal 5V VL regulator eliminates need for external bias supply, simplifying layout and improving immunity to input ripple in noisy RF environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail power management applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX1965TEEP	20-pin QSOP with four positive + one negative gain blocks; adds voltage tracking (not sequencing) and FB5/B5 for -5V/-12V generation.	Supports quintuple outputs including negative rail; used where system requires inverted supply (e.g., op-amp bias) alongside three positives.	Select MAX1965TEEP only if fourth/fifth rail or negative output is required; MAX1964TEEE remains optimal for triple-positive, sequencing-only designs.
TPS54620RGYT	Single-channel 6A synchronous buck with integrated FETs; no auxiliary gain blocks or sequencing logic; requires external LDOs for secondary rails.	Requires discrete linear regulators and external sequencing IC (e.g., TPS3808) to replicate triple-rail functionality - increases BOM count and layout complexity.	Choose TPS54620RGYT only for high-current single-rail applications; MAX1964TEEE provides integrated sequencing and auxiliary regulation at lower total system cost.

Compared with MAX1965TEEP, MAX1964TEEE offers simpler sequencing control and smaller footprint for triple-rail systems, while TPS54620RGYT demands additional components to achieve equivalent functionality - making MAX1964TEEE the most integrated solution for cost-sensitive CPE with strict startup ordering.

Availability

MAX1964TEEE is available at Aetrix Electronics and suitable for cable modem, set-top box, and xDSL CPE applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MAX1964TEEE 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, communications, and consumer applications.

The MAX1964TEEE belongs to Maxim's tracking/sequencing power-supply controller product line, designed specifically for cost-sensitive broadband CPE equipment needing multiple synchronized rails from a single unregulated input.

FAQ

What is the maximum output current capability of the main step-down converter in MAX1964TEEE?

The MAX1964TEEE itself does not define a fixed maximum output current; it is a controller IC whose output current is determined by external components - primarily the selected high-side/low-side MOSFETs, inductor value, and thermal design. Typical reference designs deliver up to 5A continuous with appropriate FETs and layout. The current-limit threshold is adjustable from 106mV to 530mV via the ILIM pin, allowing optimization for specific MOSFET R_DS(ON) values in the MAX1964TEEE application.

Does MAX1964TEEE support adjustable switching frequency?

No, MAX1964TEEE operates at a fixed 200kHz switching frequency with ±40kHz variation over temperature and supply voltage. There is no external pin or register to adjust f_OSC; this fixed frequency is optimized for use with low-cost aluminum electrolytic capacitors and standard power inductors in cost-sensitive CPE applications. The MAX1964TEEE datasheet confirms no frequency programming capability.

Can MAX1964TEEE generate a negative output voltage?

No, MAX1964TEEE cannot generate negative output voltages. It contains two positive analog gain blocks (B2/FB2 and B3/FB3) for auxiliary positive rails only. The negative regulator capability (B5/FB5) is exclusive to the MAX1965TEEP variant. Attempting negative rail generation with MAX1964TEEE will result in improper regulation or failure to start - the MAX1964TEEE functional diagram and pin description confirm absence of B5/FB5 pins.

How does the voltage sequencing function work in MAX1964TEEE?

MAX1964TEEE implements hardware-based sequencing: the main output (via FB) must reach 1.145V before B2 activates; once FB2 reaches 1.145V, B3 activates - establishing a fixed three-rail startup order. This is implemented with internal comparators and requires no external components or firmware. The MAX1964TEEE startup waveform (Figure toc09) shows this precise timing relationship, confirming deterministic sequencing behavior unique to this device.

Is an external compensation network required for stable operation of MAX1964TEEE?

Yes, an external compensation network connected between COMP and GND is mandatory for stable current-mode control. The MAX1964TEEE datasheet specifies typical values (e.g., 470pF + 47pF + 5MΩ) in Figure 1, and omission causes oscillation or poor transient response. This network sets loop bandwidth and phase margin - the MAX1964TEEE relies on user-designed compensation because output filter characteristics vary significantly across applications.

MAX1964TEEE Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 16-SSOP (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Programmable:: Not Verified

Applications:: Power Supply Controller

Voltage - Input:: 4.5V ~ 28V

Voltage - Supply:: 4.5V ~ 28V

Current - Supply:: 1.25 mA

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QSOP

MAX1964TEEE FAQ

1.How can I place an order for MAX1964TEEE through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX1964TEEE 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 MAX1964TEEE reliable?

The price and inventory of MAX1964TEEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1964TEEE is usually 5 days.

3.What payment methods are accepted for MAX1964TEEE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1964TEEE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX1964TEEE?

MAX1964TEEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX1964TEEE 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 MAX1964TEEE?

For technical support, including MAX1964TEEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1964TEEE requirements.

6.How does Aetrix verify that MAX1964TEEE is sourced from the original manufacturer or authorized distributors?

All MAX1964TEEE 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 MAX1964TEEE meets industry standards.

7.What is the process for return or replacement of MAX1964TEEE?

All MAX1964TEEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1964TEEE, 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 MAX1964TEEE part is unused and in its original packaging.

Return procedure for MAX1964TEEE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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