Product Details
As the voltage at each monitored input exceeds its respective threshold, its corresponding output goes high after a propagation delay or a capacitor-set time delay. When a voltage falls below its threshold, its respective output goes low after a propagation delay. Each detector circuit also includes its own enable input, allowing the power-good outputs to be shut off independently. The independent output for each detector is available with push-pull or open-drain configuration with the open-drain version capable of supporting voltages up to 28V, thereby allowing them to interface to shutdown and enable inputs of various DC-DC regulators. Each detector can operate independently as four separate supervisory circuits or can be daisy-chained to provide controlled power-supply sequencing.
The MAX16025–MAX16030 also include a reset function that deasserts only after all of the independently monitored voltages exceed their threshold. The reset timeout is internally fixed or can be adjusted externally. These devices are offered in a 4mm x 4mm TQFN package and are fully specified from -40°C to +125°C.
Key Features
- 2.2V to 28V Operating Voltage Range
- Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V Systems
- 1.5% Accurate Adjustable Threshold Monitors Voltages Down to 0.5V
- 2.7% Accurate Fixed Thresholds Over Temperature
- Fixed (140ms min)/Capacitor-Adjustable Delay Timing
- Independent Open-Drain/Push-Pull Outputs
- Enable Inputs for Each Monitored Voltage
- 9 Logic-Selectable Threshold Options
- Manual Reset and Tolerance Select (5%/10%) Inputs
- Small, 4mm x 4mm TQFN Package
- Fully Specified from -40°C to +125°C
Applications/Uses
- DC-DC Supplies
- Multivoltage Systems
- Networking/Telecommunication Equipment
- Servers/Workstations
- Storage Systems
Reset Thresh. (V) | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 >=5.5 |
Reset Thresh. Accur. (%) (@ +25°C) | 1.5 |
Reset Out | Active Low Open Drain |
tRESET (min) | 1ms to 15ms 15ms to 85ms 85ms to 300ms 300ms to 1s <1ms >1s Adjustable |
Watchdog Feature | No Watchdog |
Supervisor Features | Adjustable Reset Input High Voltage (>6V) Manual Reset Power Fail Comparator/Low Battery Detect |
ICC (µA) (max) | 75 |
Package/Pins | TQFN/16 |
Reset Thresh. (V) | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 >=5.5 |
Reset Thresh. Accur. (%) (@ +25°C) | 1.5 |
Reset Out | Active Low Open Drain |
tRESET (min) | 1ms to 15ms 15ms to 85ms 85ms to 300ms 300ms to 1s <1ms >1s Adjustable |
Watchdog Feature | No Watchdog |
Supervisor Features | Adjustable Reset Input High Voltage (>6V) Manual Reset Power Fail Comparator/Low Battery Detect |
ICC (µA) (max) | 75 |
Package/Pins | TQFN/24 |
Budgetary Price (See Notes) | - |
Reset Thresh. (V) | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 >=5.5 |
Reset Thresh. Accur. (%) (@ +25°C) | 1.5 |
Reset Out | Active Low Open Drain |
tRESET (min) | 1ms to 15ms 15ms to 85ms 85ms to 300ms 300ms to 1s <1ms >1s Adjustable |
Watchdog Feature | No Watchdog |
Supervisor Features | Adjustable Reset Input High Voltage (>6V) Manual Reset Power Fail Comparator/Low Battery Detect |
ICC (µA) (max) | 75 |
Package/Pins | TQFN/20 |
# Input Channels | 3 |
Interface | Factory Fixed R/C Adjustable |
Option | Sequence |
VIN (V) (max) | <6 >6 |
Oper. Temp. (°C) | -40 to +125 |
Package/Pins | TQFN/20 |
Budgetary Price (See Notes) | $3.72 @1k |
Simplified Block Diagram
MAX16025, MAX16026, MAX16027, MAX16028, MAX16029, MAX16030: Typical Operating Circuit
Technical Docs
Data Sheet | Dual-/Triple-/Quad-Voltage, Capacitor-Adjustable, Sequencing/Supervisory Circuits | Feb 14, 2007 | |
App Note | Low-Cost Power-Supply Sequencer |
Click any title below to view the detail page where available.
Description
The MAX16029 evaluation kit (EV kit) is designed to evaluate the MAX16029 quad-voltage, capacitor-adjustable, sequencing/supervisory circuit. The kit includes a fully assembled and tested PCB that allows easy access to all major functions of the part, including the inputs, timeout-delay capacitors, and outputs.
The MAX16029 EV kit comes with the MAX16029 installed, but can also be used to evaluate the MAX16030 and MAX16043.
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Support & Training
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Parameters
Reset Thresh. (V) | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 >=5.5 |
Reset Thresh. Accur. (%) (@ +25°C) | 1.5 |
Reset Out | Active Low Open Drain |
tRESET (min) | 1ms to 15ms 15ms to 85ms 85ms to 300ms 300ms to 1s <1ms >1s Adjustable |
Watchdog Feature | No Watchdog |
Supervisor Features | Adjustable Reset Input High Voltage (>6V) Manual Reset Power Fail Comparator/Low Battery Detect |
ICC (µA) (max) | 75 |
Package/Pins | TQFN/16 |
Reset Thresh. (V) | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 >=5.5 |
Reset Thresh. Accur. (%) (@ +25°C) | 1.5 |
Reset Out | Active Low Open Drain |
tRESET (min) | 1ms to 15ms 15ms to 85ms 85ms to 300ms 300ms to 1s <1ms >1s Adjustable |
Watchdog Feature | No Watchdog |
Supervisor Features | Adjustable Reset Input High Voltage (>6V) Manual Reset Power Fail Comparator/Low Battery Detect |
ICC (µA) (max) | 75 |
Package/Pins | TQFN/24 |
Budgetary Price (See Notes) | - |
Reset Thresh. (V) | 0 to 1.2 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 >=5.5 |
Reset Thresh. Accur. (%) (@ +25°C) | 1.5 |
Reset Out | Active Low Open Drain |
tRESET (min) | 1ms to 15ms 15ms to 85ms 85ms to 300ms 300ms to 1s <1ms >1s Adjustable |
Watchdog Feature | No Watchdog |
Supervisor Features | Adjustable Reset Input High Voltage (>6V) Manual Reset Power Fail Comparator/Low Battery Detect |
ICC (µA) (max) | 75 |
Package/Pins | TQFN/20 |
# Input Channels | 3 |
Interface | Factory Fixed R/C Adjustable |
Option | Sequence |
VIN (V) (max) | <6 >6 |
Oper. Temp. (°C) | -40 to +125 |
Package/Pins | TQFN/20 |
Budgetary Price (See Notes) | $3.72 @1k |
Key Features
- 2.2V to 28V Operating Voltage Range
- Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V Systems
- 1.5% Accurate Adjustable Threshold Monitors Voltages Down to 0.5V
- 2.7% Accurate Fixed Thresholds Over Temperature
- Fixed (140ms min)/Capacitor-Adjustable Delay Timing
- Independent Open-Drain/Push-Pull Outputs
- Enable Inputs for Each Monitored Voltage
- 9 Logic-Selectable Threshold Options
- Manual Reset and Tolerance Select (5%/10%) Inputs
- Small, 4mm x 4mm TQFN Package
- Fully Specified from -40°C to +125°C
Applications/Uses
- DC-DC Supplies
- Multivoltage Systems
- Networking/Telecommunication Equipment
- Servers/Workstations
- Storage Systems
Description
As the voltage at each monitored input exceeds its respective threshold, its corresponding output goes high after a propagation delay or a capacitor-set time delay. When a voltage falls below its threshold, its respective output goes low after a propagation delay. Each detector circuit also includes its own enable input, allowing the power-good outputs to be shut off independently. The independent output for each detector is available with push-pull or open-drain configuration with the open-drain version capable of supporting voltages up to 28V, thereby allowing them to interface to shutdown and enable inputs of various DC-DC regulators. Each detector can operate independently as four separate supervisory circuits or can be daisy-chained to provide controlled power-supply sequencing.
The MAX16025–MAX16030 also include a reset function that deasserts only after all of the independently monitored voltages exceed their threshold. The reset timeout is internally fixed or can be adjusted externally. These devices are offered in a 4mm x 4mm TQFN package and are fully specified from -40°C to +125°C.
Simplified Block Diagram
MAX16025, MAX16026, MAX16027, MAX16028, MAX16029, MAX16030: Typical Operating Circuit
Technical Docs
Data Sheet | Dual-/Triple-/Quad-Voltage, Capacitor-Adjustable, Sequencing/Supervisory Circuits | Feb 14, 2007 | |
App Note | Low-Cost Power-Supply Sequencer |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal