My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16999AUA12+
- Part No.:
- MAX16999AUA12+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX16999AUA12+.pdf
- Description:
- IC REG LINEAR 1.2V 100MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,707
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX16999AUA12+ from Maxim Integrated is a low-quiescent-current linear regulator delivering 100mA at up to +125°C, with preset 1.2V output, 13μA quiescent current, and active-low open-drain reset with programmable POR delay via external CRES capacitor. It serves as a parallel keep-alive supply for microcontroller core/interrupt sections during sleep mode in high-temperature automotive and industrial systems.
For engineers reviewing the MAX16999AUA12+ datasheet, MAX16999AUA12+ pinout, MAX16999AUA12+ application, or MAX16999AUA12+ equivalent, key selection criteria include guaranteed 100mA output at +125°C, ±2.5% output voltage accuracy over temperature and load, thermal shutdown at +165°C, logic-controlled enable with latched state, and adjustable reset timeout supporting power-supply sequencing in always-on embedded systems.
Technical Context
The MAX16999AUA12+ integrates a p-channel MOSFET pass transistor, precision error amplifier, and internal 0.825×VREF reference to regulate 1.2V output from 2.5V–5.5V input. Its POR timer uses a 10μA CRES pullup current charging an external capacitor to generate reset timeout, with fault-timer fallback (100ms max) ensuring robust startup even with CRES faults.
It features undervoltage lockout (UVLO) with 2.2V threshold and 45mV hysteresis, short-circuit protection sustaining continuous output short, and thermal shutdown with 15°C hysteresis. The EN input includes 120kΩ internal pullup/pulldown resistors and retains its last state if disconnected-critical for fail-safe operation in unattended systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 1.2V ±2.5% over -40°C to +125°C - ensures stable core bias for μC sleep-mode operation |
| Quiescent Current | 13μA typical at IOUT = 100μA - enables multi-year battery life in always-on keep-alive applications |
| Max Output Current | 100mA at TA = +125°C - supports full-load operation in under-hood automotive environments |
| Droput Voltage | 35mV at IOUT = 80mA, VOUT = 3.3V - minimal headroom loss preserves efficiency in low-VIN scenarios |
| Reset Threshold | 82.5% of VOUT (typ), with 2.5% hysteresis - precise brownout detection prevents spurious resets |
| PSRR | 70dB at 100Hz, 40dB at 100kHz - suppresses ripple from noisy upstream supplies feeding sensitive logic |
| Thermal Shutdown | +165°C with 15°C hysteresis - self-recovering protection avoids latch-up during transient overload |
Pinout & Package
MAX16999AUA12+ uses an 8-pin μMAX® package with exposed pad (U8E+2 outline), optimized for thermal dissipation on multilayer PCBs (θJA = 77.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 OUT | Regulator output | Bypass with 4.7μF ceramic capacitor; goes high-impedance when EN = low - enables seamless parallel supply operation |
| 3 CRES | POR timing node | Charged by 10μA internal current; timeout set by external capacitor - provides configurable power-on reset delay |
| 4 RESET | Open-drain active-low reset | Pulled low when VOUT < 82.5% nominal; high-impedance otherwise - interfaces directly with μC reset inputs |
| 5 GND | Power ground | Connected to large PCB ground plane and exposed paddle - critical for thermal performance and noise immunity |
| 6 EN | Active-high enable | Latched input with 120kΩ internal resistor - maintains state during signal loss, enabling fail-safe shutdown |
| 7,8 IN | Input supply | Bypassed with ≥1μF ceramic capacitor - reduces source impedance and improves transient response |
| EP | Exposed paddle | Must be soldered to PCB ground plane - primary thermal path; lowers θJC to 4.8°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Logic-Controlled Enable with Latch | EN retains last state if disconnected - eliminates unintended wake-up or shutdown in noisy harness environments |
| Adjustable POR Delay Flag | Reset timeout programmable via CRES capacitor (e.g., 15nF → ~80ms) - supports flexible power-sequence timing across system rails |
| Parallel Supply Operation | OUT goes high-impedance when disabled - allows stacking with higher-current regulators without reverse current or contention |
| Short-to-GND Protection on Reset Timer | CRES discharge path activated during shutdown - prevents capacitor charge retention that could delay subsequent startup |
| High-Temperature Guaranteed Performance | 100mA output and full specs validated to +125°C ambient - suitable for engine-control and telematics modules |
Applications
| Automotive Telematics Modules | Industrial SDRAM Power Supplies |
|---|---|
Use Scenario: Powering GPS/4G modem baseband processors during vehicle ignition-off state to maintain network registration and location tracking. IC Role / Device Role / Timing Role: Always-on 1.2V low-IQ supply for μC interrupt controller and real-time clock, with POR reset coordinating with main SoC boot sequence. Use Value: 13μA quiescent current extends battery backup life beyond 3 years; reset timeout ensures clean initialization after cold crank. | Use Scenario: Providing stable 1.2V termination voltage for DDR3/DDR4 memory interface in programmable logic controllers and HMIs. IC Role / Device Role / Timing Role: Low-noise auxiliary rail decoupled from main 1.2V VRM, with reset flag signaling memory initialization readiness. Use Value: 70dB PSRR at 100Hz suppresses switching noise from adjacent DC/DC converters; ±2.5% accuracy guarantees SDRAM VTT compliance. |
| Keep-Alive Timers in Motor Control Units | Handheld Medical Device Sleep Mode |
Use Scenario: Maintaining real-time clock and watchdog circuitry in BLDC motor drives during standby, enabling instant restart after power interruption. IC Role / Device Role / Timing Role: Dedicated 1.2V supply for RTC oscillator and supervisor IC, with programmable reset delay matching MCU wake-up latency. Use Value: Adjustable CRES timeout (15nF → 80ms) aligns reset assertion with crystal stabilization time; thermal shutdown protects during motor stall events. | Use Scenario: Powering BLE radio and sensor interface ASIC during multi-week standby in portable ECG monitors powered by coin cells. IC Role / Device Role / Timing Role: Ultra-low-IQ 1.2V rail for always-listening wake-on-radio circuit, with reset flag triggering firmware recovery after brownout. Use Value: 13μA IQ enables >5-year shelf life on CR2032; 100mA capability supports brief 50mA BLE transmit bursts without dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0512PDBVR | 1.2V fixed, 200mA rating, 25μA IQ, no reset output, SOT-23-5 package | Lacks POR reset and thermal fault timer; requires external reset IC for sequencing | Choose when higher output current is needed and reset functionality is handled elsewhere |
| NCP114AMX12T2G | 1.2V fixed, 150mA rating, 22μA IQ, no CRES-adjustable reset, TSOP-5 package | No programmable POR delay; reset threshold fixed at 92% VOUT, limiting sequencing flexibility | Choose for cost-sensitive industrial applications where fixed reset timing suffices |
Compared with TPS7A0512PDBVR and NCP114AMX12T2G, the MAX16999AUA12+ uniquely combines ultra-low 13μA quiescent current, integrated adjustable POR reset, and guaranteed 100mA operation at +125°C in a thermally enhanced μMAX package-making it optimal for automotive and industrial always-on subsystems requiring autonomous power sequencing and thermal resilience.
Availability
MAX16999AUA12+ is available at Aetrix Electronics and suitable for automotive telematics, industrial SDRAM power supplies, and keep-alive timer applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX16999AUA12+ 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, automotive, and communications applications.
The MAX16999AUA12+ belongs to Maxim's high-temperature linear regulator product line, engineered specifically for always-on subsystems in automotive and industrial environments where ultra-low quiescent current, robust reset control, and guaranteed operation to +125°C ambient are mandatory.
FAQ
What is the guaranteed output current of MAX16999AUA12+ at +125°C ambient temperature?
The MAX16999AUA12+ delivers guaranteed 100mA continuous output current at TA = +125°C on a multilayer PCB, as confirmed in Table 1 of the datasheet. This rating accounts for thermal derating and ensures reliable operation in under-hood automotive locations and industrial enclosures without forced airflow.
How is the reset timeout delay programmed on MAX16999AUA12+?
The reset timeout delay on MAX16999AUA12+ is programmed by connecting an external capacitor between CRES (pin 3) and GND. A 10μA internal current charges this capacitor; when voltage reaches 600mV, RESET (pin 4) transitions high-impedance. For example, a 15nF capacitor yields ~80ms delay per the formula t = CCRES × 60 × 10³.
Does MAX16999AUA12+ support parallel operation with other regulators?
Yes, MAX16999AUA12+ supports parallel operation: when disabled via EN = low, its OUT pins go high-impedance, preventing reverse current flow or contention with a higher-current 1.2V supply. This enables hybrid power architectures where MAX16999AUA12+ handles sleep-mode loads while another regulator powers active-mode circuits.
What is the thermal protection behavior of MAX16999AUA12+ during sustained overload?
MAX16999AUA12+ features thermal shutdown at +165°C junction temperature with 15°C hysteresis. During sustained overload, it cycles ON/OFF - turning off above +165°C and resuming regulation once junction cools to +150°C - providing self-protecting pulsed output without latch-up or damage.
What package type and RoHS status does MAX16999AUA12+ use?
MAX16999AUA12+ uses the 8-pin μMAX® package with exposed pad (outline U8E+2), and the "+" suffix confirms it is lead(Pb)-free and RoHS-compliant. The exposed paddle must be soldered to a PCB ground plane to achieve specified thermal performance (θJA = 77.6°C/W on multilayer board).
MAX16999AUA12+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 20 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 40dB (100Hz ~ 100kHz)
- Control Features:
- Enable, Power On Reset, Reset
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX-EP|8-uSOP-EP
MAX16999AUA12+ FAQ
1.How can I place an order for MAX16999AUA12+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16999AUA12+ 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 MAX16999AUA12+ reliable?
The price and inventory of MAX16999AUA12+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16999AUA12+ is usually 5 days.
3.What payment methods are accepted for MAX16999AUA12+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16999AUA12+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16999AUA12+?
MAX16999AUA12+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16999AUA12+ 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 MAX16999AUA12+?
For technical support, including MAX16999AUA12+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16999AUA12+ requirements.
6.How does Aetrix verify that MAX16999AUA12+ is sourced from the original manufacturer or authorized distributors?
All MAX16999AUA12+ 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 MAX16999AUA12+ meets industry standards.
7.What is the process for return or replacement of MAX16999AUA12+?
All MAX16999AUA12+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16999AUA12+, 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 MAX16999AUA12+ part is unused and in its original packaging.
Return procedure for MAX16999AUA12+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16999AUA12+ Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
