MAX16025 查看數據表（PDF） - Unspecified
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MAX16025 Datasheet PDF : 15 Pages
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19-0525; Rev 3; 1/07 EVAALVUAAILTAIOBNLEKIT
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
General Description
The MAX16025–MAX16030 are dual-/triple-/quad-volt-
age monitors and sequencers that are offered in a
small TQFN package. These devices offer enormous
design flexibility as they allow fixed and adjustable
thresholds to be selected through logic inputs and pro-
vide sequence timing through small external capaci-
tors. These versatile devices are ideal for use in a wide
variety of multivoltage applications.
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 inde-
pendently. The independent output for each detector is
available with push-pull or open-drain configuration
with the open-drain version capable of supporting volt-
ages up to 28V, thereby allowing them to interface to
shutdown and enable inputs of various DC-DC regula-
tors. 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 func-
tion 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.
Applications
Multivoltage Systems
DC-DC Supplies
Servers/Workstations
Storage Systems
Networking/Telecommunication Equipment
Selector Guide
PART
MAX16025
MAX16026
MAX16027
MAX16028
MAX16029
MAX16030
MONITORED INDEPENDENT RESET
VOLTAGES
OUTPUTS
OUTPUT
2
2 (Open-drain) Open-drain
2
2 (Push-pull) Push-pull
3
3 (Open-drain) Open-drain
3
3 (Push-pull) Push-pull
4
4 (Open-drain) Open-drain
4
4 (Push-pull) Push-pull
Features
o 2.2V to 28V Operating Voltage Range
o Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and
1.2V Systems
o 1.5% Accurate Adjustable Threshold Monitors
Voltages Down to 0.5V
o 2.7% Accurate Fixed Thresholds Over
Temperature
o Fixed (140ms min)/Capacitor-Adjustable Delay
Timing
o Independent Open-Drain/Push-Pull Outputs
o Enable Inputs for Each Monitored Voltage
o 9 Logic-Selectable Threshold Options
o Manual Reset and Tolerance Select (5%/10%) Inputs
o Small, 4mm x 4mm TQFN Package
o Fully Specified from -40°C to +125°C
Ordering Information
PART*
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX16025TE+ -40°C to +125°C 16 TQFN T1644-4
MAX16026TE+ -40°C to +125°C 16 TQFN T1644-4
MAX16027TP+ -40°C to +125°C 20 TQFN T2044-3
MAX16028TP+ -40°C to +125°C 20 TQFN T2044-3
MAX16029TG+ -40°C to +125°C 24 TQFN T2444-4
MAX16030TG+ -40°C to +125°C 24 TQFN T2444-4
+Denotes lead-free package.
*For tape and reel, add a “T” after the “+.” All tape and reel
orders are available in 2.5k increments.
Pin Configurations
TOP VIEW
18 17 16 15 14 13
MR 19
12 TH1
CRESET 20
11 EN4
CDLY4 21
CDLY3 22
CDLY2 23
MAX16029
MAX16030
10 EN3
9 EN2
8 EN1
CDLY1 24
7 GND
+1 2 3 4 5 6
THIN QFN
(4mm x 4mm)
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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