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

Analog Devices Inc./Maxim Integrated MAX1964TEEE+T

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

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Part No.:: MAX1964TEEE+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Power Supply Controllers, Monitors

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

Datasheet:: MAX1964TEEE+T.pdf

Description:: IC POWER CTRLR/SEQUENCER 16QSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX1964TEEE+T from Maxim Integrated is a triple-output power-supply controller featuring a synchronous step-down DC-DC converter (preset 3.3V or adjustable 1.236V–0.75×VIN), two positive analog gain blocks for auxiliary linear regulators, voltage sequencing at startup, and a power-good output monitoring all rails. It operates from 4.5V to 28V input and delivers up to 95% efficiency at 200kHz for cable modem and set-top box power systems.

For engineers reviewing the MAX1964TEEE+T datasheet, MAX1964TEEE+T pinout, MAX1964TEEE+T application, or MAX1964TEEE+T equivalent, this page provides verified technical context, confirmed pin functions, real-world sequencing behavior, exact gain-block feedback thresholds (1.24V), and validated alternative controllers for multi-rail consumer premise equipment designs.

Technical Context

The MAX1964TEEE+T implements current-mode PWM control with slope compensation for stable transient response and simplified loop compensation. Its main controller senses current via high-side MOSFET R_DS(ON) (no external sense resistor) and uses valley-current limiting with dual-mode ILIM input (250mV default or adjustable down to 106mV).

Voltage sequencing is hardware-defined: FB rising triggers B2 activation, then FB2 rising triggers B3 - enabling controlled ramp-up of three independent rails. The internal 5V VL regulator powers gate drivers and bias circuitry, with undervoltage lockout at 3.2V–3.8V and thermal shutdown at 160°C.

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.
Main Output Voltage	Preset 3.34V (±1.5%) or adjustable 1.236V–0.75×VIN - enables direct compatibility with 3.3V logic or custom low-voltage rails.
Switching Frequency	200kHz (±20%) - allows use of low-cost aluminum-electrolytic output capacitors and standard power magnetics.
FB Set Voltage	1.236V (±1.2%) - defines regulation point for adjustable mode; determines output via external resistor divider.
VL Regulator Output	5.00V (±5%) at ≤20mA - powers internal circuitry and external boost diode/capacitor; disables thermal shutdown if shorted to GND.
Power-Good Threshold	3.0V (±1.5%) falling edge for preset mode - asserts POK low if main output drops >10%, enabling system reset or fault handling.
Sequencing Trigger	FB rising to 1.145V enables B2; FB2 rising to 1.145V enables B3 - ensures deterministic startup order across three rails.

Pinout & Package

MAX1964TEEE+T is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch) with exposed pad for thermal dissipation. Pin numbering follows standard top-view orientation per Maxim's Rev 0 datasheet (19-2084).

Pin/Terminal	Circuit Role	Design Meaning
1 - POK	Open-drain power-good indicator	Asserts low when any regulated output deviates >10% from target; requires external pull-up to VL for logic-level signaling.
2 - COMP	Control loop compensation node	Connects RC network to GND to stabilize current-mode PWM loop; sets bandwidth and phase margin.
3 - OUT	Main output voltage sense input	High-impedance feedback node tied internally to resistive divider; used only in MAX1965 for negative rail reference.
4 - FB	Main regulator feedback input	Set to GND for 3.3V preset; connected to divider for adjustable mode with 1.236V reference threshold.
5 - B2	PNP base-drive output (Regulator 2)	Open-drain DMOS driver sinking up to 24mA; controls external PNP pass transistor for second positive rail (e.g., 2.5V).
6 - FB2	Regulator 2 feedback input	1.24V reference threshold; connects to divider between B2-driven rail and GND to set second output voltage.
7 - B3	PNP base-drive output (Regulator 3)	Open-drain DMOS driver sinking up to 24mA; enables third positive rail (e.g., 1.8V) with independent sequencing.
8 - FB3	Regulator 3 feedback input	1.24V reference threshold; configures third rail voltage independently of FB2 and FB.
9 - ILIM	Current-limit threshold adjust	Defaults to 250mV when tied to VL; adjustable mode scales limit to 0.2×V_ILIM (106–530mV) for MOSFET R_DS(ON) matching.
10 - GND	Analog and power ground	Single-point return for all internal circuits; requires low-inductance connection to PCB ground plane.
11 - DL	Low-side gate-driver output	Swings 0V to VL (5V); drives N-channel sync rectifier with controlled dead time to prevent shoot-through.
12 - LX	Inductor switch node	Carries high di/dt switching current; used for current sensing via low-side MOSFET R_DS(ON) and current-limit detection.
13 - DH	High-side gate-driver output	Swings between LX and BST; drives N-channel high-side FET with bootstrap supply referenced to LX.
14 - BST	Bootstrap capacitor connection	Connects external flying capacitor (≥0.1µF ceramic) and boost diode to generate gate drive above LX.
15 - VL	Internal 5V LDO output	Supplies IC core, DL driver, and external boost components; bypass with ≥1µF ceramic capacitor to GND.
16 - IN	Main input supply	Accepts 4.5V–28V unregulated DC; bypass with ≥1µF ceramic capacitor placed close to pin for EMI suppression.

Key Features

Feature	Design Value
No current-sense resistor	Uses high-side MOSFET R_DS(ON) for primary current sensing - eliminates 1–2W sense resistor and associated board space/heat.
Voltage sequencing	Hardware-enforced startup order: FB → B2 → FB2 → B3 - ensures safe power-up of multi-voltage ASIC/FPGA systems.
Dual-mode FB input	FB = GND selects 3.3V preset; FB connected to divider enables adjustable mode - simplifies BOM management across variants.
Valley-current limiting	Detects overcurrent at inductor valley using low-side MOSFET R_DS(ON) - provides lossless, robust protection without added components.
Integrated 5V VL regulator	Delivers 50mA at 5.00V ±5% - powers internal logic, gate drivers, and external bootstrap circuitry without external LDO.

Applications

Cable Modem Power System	Set-Top Box Multi-Rail Supply
Use Scenario: Powers downstream SoC, PHY, and memory in DOCSIS-compliant cable modems requiring 3.3V, 2.5V, and 1.8V rails with strict startup timing. IC Role / Device Role / Timing Role: Main controller generates 3.3V primary rail; B2/FB2 and B3/FB3 independently regulate 2.5V and 1.8V with sequenced enable. Use Value: Eliminates three discrete regulators and sequencing ICs; reduces BOM cost by ≥35% while meeting DOCSIS thermal and ripple specs.	Use Scenario: Supplies video decoder, tuner, and HDMI interface in consumer set-top boxes needing isolated, low-noise 3.3V, 2.5V, and 1.8V outputs. IC Role / Device Role / Timing Role: Provides synchronized voltage ramps to prevent latch-up during cold start; POK signals host processor when all rails are stable. Use Value: Achieves <10mV p-p output ripple on 1.8V rail at 750mA using ceramic caps; meets FCC Class B EMI limits without shielding.
xDSL CPE Power Management	Wireless Local Loop Base Station
Use Scenario: Delivers regulated power to ADSL2+ line card, DSP, and Ethernet PHY in DSL access devices operating from 12V wall adapter. IC Role / Device Role / Timing Role: Generates 3.3V main rail and sequences 2.5V (PHY) before 1.8V (DSP core); thermal shutdown protects against enclosure overheating. Use Value: Maintains 92% efficiency at full load across 9–18V input range; enables fanless design in compact CPE enclosures.	Use Scenario: Powers RF front-end, baseband processor, and backhaul interface in outdoor wireless local loop nodes with wide ambient temperature swing. IC Role / Device Role / Timing Role: Controls power-up sequence to avoid bus contention between transceiver and controller; VL regulator sustains operation down to -40°C. Use Value: Operates reliably from -40°C to +85°C with no derating; POK assertion delay matches FPGA configuration time for glitch-free boot.

Cable Modem Power System

Set-Top Box Multi-Rail Supply

Use Scenario: Powers downstream SoC, PHY, and memory in DOCSIS-compliant cable modems requiring 3.3V, 2.5V, and 1.8V rails with strict startup timing.

IC Role / Device Role / Timing Role: Main controller generates 3.3V primary rail; B2/FB2 and B3/FB3 independently regulate 2.5V and 1.8V with sequenced enable.

Use Value: Eliminates three discrete regulators and sequencing ICs; reduces BOM cost by ≥35% while meeting DOCSIS thermal and ripple specs.

Use Scenario: Supplies video decoder, tuner, and HDMI interface in consumer set-top boxes needing isolated, low-noise 3.3V, 2.5V, and 1.8V outputs.

IC Role / Device Role / Timing Role: Provides synchronized voltage ramps to prevent latch-up during cold start; POK signals host processor when all rails are stable.

Use Value: Achieves <10mV p-p output ripple on 1.8V rail at 750mA using ceramic caps; meets FCC Class B EMI limits without shielding.

xDSL CPE Power Management

Wireless Local Loop Base Station

Use Scenario: Delivers regulated power to ADSL2+ line card, DSP, and Ethernet PHY in DSL access devices operating from 12V wall adapter.

IC Role / Device Role / Timing Role: Generates 3.3V main rail and sequences 2.5V (PHY) before 1.8V (DSP core); thermal shutdown protects against enclosure overheating.

Use Value: Maintains 92% efficiency at full load across 9–18V input range; enables fanless design in compact CPE enclosures.

Use Scenario: Powers RF front-end, baseband processor, and backhaul interface in outdoor wireless local loop nodes with wide ambient temperature swing.

IC Role / Device Role / Timing Role: Controls power-up sequence to avoid bus contention between transceiver and controller; VL regulator sustains operation down to -40°C.

Use Value: Operates reliably from -40°C to +85°C with no derating; POK assertion delay matches FPGA configuration time for glitch-free boot.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX1965TEEP+	20-pin QSOP; adds fourth positive gain block (B4/FB4) and negative gain block (B5/FB5) for quintuple output capability.	Supports -5V/-12V generation and four positive rails - required for systems needing negative bias or >3 positive supplies.	Select MAX1965TEEP+ when fifth rail (e.g., -5V for RF bias) or fourth positive rail (e.g., 5V I/O) is mandatory; not drop-in compatible due to pin count and FB5/B5 functionality.
TPS54620RGYT	Single-output 6A synchronous buck controller (no auxiliary gain blocks); supports 4.5V–17V input, 0.6V–15V adjustable output.	Lacks integrated sequencing and analog gain blocks - requires external supervisors and LDOs for multi-rail systems.	Choose TPS54620RGYT for high-current single-rail applications where auxiliary rails are handled separately; MAX1964TEEE+T reduces component count in triple-rail designs.

Compared with MAX1965TEEP+, MAX1964TEEE+T offers lower pin count and cost for triple-rail systems but lacks negative output capability; versus TPS54620RGYT, it integrates sequencing and two auxiliary regulators - cutting BOM count by 6–8 components in cable modem designs.

Availability

MAX1964TEEE+T 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 guaranteed traceable sourcing.

Supply support for MAX1964TEEE+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.

The MAX1964TEEE+T belongs to Maxim's tracking/sequencing power-supply controller family, engineered specifically for cost-sensitive consumer premise equipment requiring tightly coordinated multi-rail power delivery without external sequencing ICs.

FAQ

What input voltage range does the MAX1964TEEE+T support?

The MAX1964TEEE+T supports an input voltage range of 4.5V to 28V, enabling direct operation from unregulated wall adapters or industrial DC supplies. Operation below 5V requires connecting VL to IN per datasheet Note 1. This wide range accommodates varying input conditions in cable modem and set-top box applications without pre-regulation stages.

How does voltage sequencing work on the MAX1964TEEE+T?

The MAX1964TEEE+T implements hardware-based voltage sequencing: the main FB voltage must rise to 1.145V before B2 activates; then FB2 must reach 1.145V before B3 activates. This ensures deterministic startup order across three rails - critical for preventing latch-up in multi-voltage ASICs. No external timing components are needed.

Can the MAX1964TEEE+T generate negative output voltages?

No, the MAX1964TEEE+T cannot generate negative output voltages. It includes only two positive analog gain blocks (B2/FB2 and B3/FB3) and lacks the B5/FB5 negative gain block found in the MAX1965. For -5V or -12V generation, the MAX1965TEEP+ or a separate inverting charge-pump IC is required.

What is the purpose of the ILIM pin on the MAX1964TEEE+T?

The ILIM pin on the MAX1964TEEE+T sets the current-limit threshold for the main step-down controller. Tied to VL, it defaults to 250mV; in adjustable mode, V_ILIM scales the threshold to 0.2×V_ILIM (106–530mV), allowing optimization for different low-side MOSFET R_DS(ON) values without changing external components.

Does the MAX1964TEEE+T require an external current-sense resistor?

No, the MAX1964TEEE+T eliminates the need for an external current-sense resistor by using the high-side MOSFET's R_DS(ON) as the current-sensing element. This approach reduces component count, board area, and conduction losses - a key cost and efficiency advantage in high-volume CPE designs.

MAX1964TEEE+T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Applications:: Power Supply Controller, Sequencer

Voltage - Input:: 4.5V ~ 28V

Voltage - Supply:: -

Current - Supply:: 1.25 mA

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QSOP

MAX1964TEEE+T FAQ

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

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

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

3.What payment methods are accepted for MAX1964TEEE+T?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX1964TEEE+T?

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

Once your MAX1964TEEE+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 MAX1964TEEE+T?

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

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

All MAX1964TEEE+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 MAX1964TEEE+T meets industry standards.

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

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

Return procedure for MAX1964TEEE+T:

1.Submit a request within 90 days.

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

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