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Analog Devices Inc./Maxim Integrated MAX8636ETA+T
- Part No.:
- MAX8636ETA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8636ETA+T.pdf
- Description:
- IC REG LIN POS PROG 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
The MAX8636ETA+T from Maxim Integrated is a dual 300mA pin-programmable LDO linear regulator in an 8-pin 3mm x 3mm TDFN package, operating from 2.7V to 5.5V input and delivering up to 300mA per output with 90mV dropout at 100mA. It features low-noise operation (45µVRMS), single SHDN control for both regulators, and BP pin for noise bypass-designed for battery-powered portable electronics requiring stable dual-rail power with minimal external components.
For engineers reviewing the MAX8636ETA+T datasheet, MAX8636ETA+T pinout, MAX8636ETA+T application, or MAX8636ETA+T equivalent, key selection criteria include its dual-output programmability via P1/P2 logic states, thermal shutdown at +165°C, 54µA quiescent current (both LDOs active), and compatibility with ceramic capacitors ≥2.2µF for stability across –40°C to +85°C.
Technical Context
The MAX8636ETA+T integrates two independent p-channel MOSFET pass transistors with internal 1.50V reference and error amplifiers, enabling precise regulation without external feedback resistors. Its pin-programmable architecture uses P1 and P2 inputs to select one of nine preset OUT1/OUT2 voltage combinations-including 2.85V/2.85V, 3.00V/2.50V, and 2.80V/2.60V-determined at power-on and retained until reset or shutdown cycle.
It implements a dedicated BP (bypass) terminal connected to an internal reference node, allowing a 0.01µF capacitor to reduce output noise below 45µVRMS (10Hz–100kHz). Unlike MAX8633/MAX8635, the MAX8636ETA+T includes this BP pin and supports low-noise operation but omits the RESET output found in MAX8633.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, Li-polymer, and regulated 3.3V/5V rails without external pre-regulation. |
| Output Current per Channel | 300mA - sufficient to power core logic, RF ICs, or display drivers in compact portable devices. |
| Dropout Voltage | 90mV at 100mA load - enables extended battery runtime by regulating down to VOUT + 90mV, critical near end-of-discharge. |
| Quiescent Current | 54µA (both LDOs on) - minimizes standby power loss in always-on subsystems like real-time clocks or sensors. |
| Output Noise | 45µVRMS (10Hz–100kHz) - meets stringent noise requirements for ADC references, PLL supplies, and audio codecs. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and consumer handheld environments including cellular handsets and wireless LAN cards. |
| Shutdown Current | <1µA max - ensures negligible battery drain during deep sleep modes when SHDN is asserted. |
Pinout & Package
Package: 8-pin TDFN (3mm x 3mm), exposed paddle (EP) soldered to PCB ground plane for enhanced thermal dissipation (PDMAX = 1904mW at +70°C, derated 23.8mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input Supply | Accepts 2.7V–5.5V input; requires ≥2.2µF ceramic bypass to GND for stability and PSRR performance. |
| 2 SHDN | Active-Low Shutdown Control | Single input disabling both LDOs; logic low reduces supply current to <1µA; connect to IN or high for normal operation. |
| 3 P2 | Output-Voltage Programming Input | One of two logic-select pins determining OUT1/OUT2 voltage pair (e.g., P2=IN, P1=GND → 3.00V/2.50V); state latched at power-on. |
| 4 P1 | Output-Voltage Programming Input | Second programming pin; combined with P2 selects one of nine preset dual-output voltages per Table 3 in datasheet. |
| 5 BP | Noise Bypass Terminal | Connects to internal reference; 0.01µF capacitor to GND reduces output noise to 45µVRMS; omit if noise sensitivity is low. |
| 6 GND | Power and Signal Ground | Common return path; must be tied to EP (exposed paddle) for thermal and electrical integrity in TDFN package. |
| 7 OUT2 | Second Regulated Output | Delivers up to 300mA; voltage set by P1/P2; bypass with ≥2.2µF ceramic capacitor for transient response and stability. |
| 8 OUT1 | First Regulated Output | Delivers up to 300mA; voltage set by same P1/P2 logic; independent current limiting (400–600mA min/max) protects against shorts. |
Key Features
| Feature | Design Value |
|---|---|
| Dual pin-programmable outputs | Nine preset voltage combinations (e.g., 2.85V/2.85V, 3.00V/3.00V) selected via P1/P2 logic states-eliminates need for precision 1% feedback resistors and reduces BOM count. |
| Ultra-low-noise regulation | 45µVRMS output noise (10Hz–100kHz) achieved via BP pin and 0.01µF capacitor-enables clean power for noise-sensitive analog circuits. |
| p-Channel MOSFET pass devices | 0.9Ω RDS(ON) delivers low dropout proportional to load (90mV @ 100mA), unlike fixed-dropout PNP-based LDOs, improving efficiency at light and heavy loads. |
| Thermal and current protection | Integrated thermal shutdown triggers at +165°C (15°C hysteresis); independent 400–600mA current limit per output prevents damage during overload or short-circuit events. |
| Low-quiescent, low-shutdown current | 54µA typical supply current with both LDOs active; <1µA max in shutdown-extends battery life in portable applications with frequent sleep/wake cycles. |
Applications
| Cellular Handsets | Wireless LAN Cards |
|---|---|
Use Scenario: Powering baseband processor core (1.8V) and RF transceiver (2.8V) from a single Li-ion cell in slim smartphone designs. IC Role / Device Role / Timing Role: Dual-rail LDO providing isolated, low-noise, and independently programmable voltage domains with no external resistors. Use Value: Enables compact layout with 3mm × 3mm footprint; 45µVRMS noise prevents RF desensitization; 90mV dropout extends usable battery range by ~150mV. | Use Scenario: Supplying 2.85V to WLAN SoC and 2.85V to PA bias circuitry in mini-PCIe or M.2 form-factor modules. IC Role / Device Role / Timing Role: Single-chip dual LDO replacing discrete regulators and reducing component count while maintaining rail separation. Use Value: Pin-programmability eliminates resistor placement errors; thermal shutdown prevents overheating during sustained TX bursts; 54µA IQ preserves host system standby time. |
| Digital Cameras | Notebook Subsystems |
Use Scenario: Delivering 2.80V to image sensor and 1.50V to ISP in ultra-thin digital still cameras with tight thermal constraints. IC Role / Device Role / Timing Role: Dual-output LDO with programmable voltages configured at boot via P1/P2 pull-up/down, ensuring correct rail sequencing without firmware intervention. Use Value: Eliminates need for two separate LDOs and associated passives; BP pin support allows clean sensor analog supply without added filtering components. | Use Scenario: Powering embedded controller (3.0V) and touchpad interface (2.6V) in ultrabook keyboard assemblies where space and heat are limited. IC Role / Device Role / Timing Role: Compact dual LDO with shared SHDN control simplifying power management logic and reducing GPIO usage on EC. Use Value: 3mm × 3mm TDFN package fits narrow flex-PCB zones; 1904mW thermal rating allows continuous 300mA per rail under ambient +70°C conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8635ETA+ | No BP pin; no low-noise mode; same P1/P2 programming and 9-output matrix as MAX8636ETA+T. | Suitable where output noise >100µVRMS is acceptable; lacks noise-bypass capability for sensitive analog rails. | Select MAX8635ETA+ only if noise performance is non-critical and cost reduction is prioritized over BP functionality. |
| TPL7407LADGQR | Single 300mA LDO (not dual); no pin-programmable outputs; fixed 3.3V output; 125mV dropout at 300mA. | Requires two devices plus external resistors to replicate dual-rail programmability; larger total footprint and higher BOM cost. | Use only when dual-output integration is unnecessary and fixed-voltage rails suffice for the design. |
Compared with MAX8635ETA+, the MAX8636ETA+T adds BP-enabled low-noise operation without sacrificing pin-programmability or thermal performance; versus TPL7407LADGQR, it provides true dual-rail integration, eliminating second device, external resistors, and layout complexity-justifying its use in space-constrained, noise-sensitive dual-supply systems.
Availability
MAX8636ETA+T is available at Aetrix Electronics and suitable for cellular handsets, wireless LAN cards, and digital camera modules requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX8636ETA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX8633–MAX8636 product line was designed specifically for ultra-compact, battery-powered portable electronics needing dual, low-noise, pin-configurable LDOs with minimal external components and extended operational lifetime.
FAQ
What output voltage combinations does the MAX8636ETA+T support?
The MAX8636ETA+T supports nine preset dual-output voltage combinations determined by the logic states of P1 and P2 at power-on, including 2.85V/2.85V, 3.00V/2.50V, 2.80V/2.60V, and 3.00V/3.00V. These values are fixed per Table 3 in the datasheet and cannot be altered dynamically-only reconfigured by cycling power or asserting SHDN.
Does the MAX8636ETA+T include a RESET output function?
No, the MAX8636ETA+T does not include a RESET output. That feature is exclusive to the MAX8633 variant. The MAX8636ETA+T omits the RESET pin but adds the BP (bypass) pin for low-noise operation-making it distinct from MAX8633 while sharing pin-programmability and dual-LDO architecture.
How is low output noise achieved in the MAX8636ETA+T?
The MAX8636ETA+T achieves 45µVRMS output noise (10Hz–100kHz) by routing the internal voltage reference through the BP pin, where a 0.01µF ceramic capacitor to GND forms a low-pass filter. This configuration is mandatory for low-noise operation; omitting the BP capacitor results in higher noise and forfeits the key advantage over non-BP variants like MAX8635ETA+.
What is the maximum power dissipation of the MAX8636ETA+T package?
The MAX8636ETA+T in the 8-pin TDFN (3mm × 3mm) package has a maximum power dissipation of 1904mW at +70°C, derated by 23.8mW/°C above that temperature. This rating assumes proper thermal design-including soldering the exposed paddle (EP) to a large PCB ground plane-to maintain junction temperature below +150°C under full 300mA load per output.
Can P1 and P2 be changed dynamically to adjust output voltages during operation?
No, P1 and P2 states are sampled only at power-on or after a full shutdown cycle (SHDN low followed by high). Changing P1/P2 logic levels during normal operation has no effect on regulated output voltages-the MAX8636ETA+T latches the configuration once and holds it until reset. Dynamic voltage scaling requires external switching or a different regulator family.
MAX8636ETA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Programmable
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V, 2.8V
- Voltage - Output (Max):
- 3V, 3V
- Voltage Dropout (Max):
- 0.2V @ 100mA, 0.2V @ 100mA
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB ~ 55dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX8636ETA+T FAQ
1.How can I place an order for MAX8636ETA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8636ETA+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 MAX8636ETA+T reliable?
The price and inventory of MAX8636ETA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8636ETA+T is usually 5 days.
3.What payment methods are accepted for MAX8636ETA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8636ETA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8636ETA+T?
MAX8636ETA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8636ETA+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 MAX8636ETA+T?
For technical support, including MAX8636ETA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8636ETA+T requirements.
6.How does Aetrix verify that MAX8636ETA+T is sourced from the original manufacturer or authorized distributors?
All MAX8636ETA+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 MAX8636ETA+T meets industry standards.
7.What is the process for return or replacement of MAX8636ETA+T?
All MAX8636ETA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8636ETA+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 MAX8636ETA+T part is unused and in its original packaging.
Return procedure for MAX8636ETA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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