MIC2772-L3L3YML TR Micrel Inc, MIC2772-L3L3YML TR Datasheet

IC RESET GENERATOR DUAL 8-MLF

MIC2772-L3L3YML TR

Manufacturer Part Number
MIC2772-L3L3YML TR
Description
IC RESET GENERATOR DUAL 8-MLF
Manufacturer
Micrel Inc
Type
Multi-Voltage Supervisorr
Datasheet

Specifications of MIC2772-L3L3YML TR

Number Of Voltages Monitored
2
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
4.63V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MLF®, QFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
576-2665-2
MIC2772-L3L3YML TR
MIC2772-L3L3YMLTR
MIC2772-L3L3YMLTR
General Description
The MIC2772 is a dual power supply supervisor that
provides under-voltage monitoring and power-on
reset generation.
voltage supervisors such as MIC1810, MIC1815,
MIC809, MIC811, MIC6315, etc. The two voltage
supervisors are completely independent. Each
functional block features an under-voltage detector,
a delay-generator, and a de-bounced manual reset
input.
A wide choice of voltage thresholds is available.
The reset output is asserted at power-on and any
time the input voltage drops below the reference
voltage. It remains asserted for the chosen timeout
period after the input rises back above the threshold.
Reset timeouts of 20, 140, and 1100ms (minimum)
are available.
A reset can be generated at any time by asserting
the manual reset input, /MR. This input is internally
de-bounced, and the reset output will remain active
for the timeout period after the release of /MR. The
/MR input can also be used to daisy-chain one or
more of the MIC2772’s supervisors onto existing
power monitoring circuitry or other supervisors.
The tiny 2x2mm MLF package has a footprint
smaller than that of a single SOT23 voltage
supervisor.
Data sheets and support documentation can be
found on Micrel’s web site at www.micrel.com.
____________________________________________________________________________________________________
Typical Application
April 2005
It may replace two discrete
MIC2772 Typical Application Circuit
MR1
MR2
RESET2
RESET1
GND2
VCC2
GND1
VCC1
VCC1
VCC2
Features
• Two independent voltage supervisors
• Directly replaces discrete supervisors
• Generates power-on reset pulses
• De-bounced manual reset Inputs
• Choice of voltage thresholds
• 20, 140, or 1100ms reset timeouts
• Reset output may be pulled above VCC
• Rejects brief input transients
• Ultra-small 2x2mm MLF package
Applications
• Servers
• Embedded Controllers
• Telecommunications Systems
• Power Supply Sequencing
• Hot-swapping
• Power supplies
10k
10k
VCC
RESET
GND
VCC
RESET
GND
Dual Voltage Supervisor
µP
µP
MIC2772
(408) 955-1690
M9999-042005

Related parts for MIC2772-L3L3YML TR

MIC2772-L3L3YML TR Summary of contents

Page 1

... General Description The MIC2772 is a dual power supply supervisor that provides under-voltage monitoring and power-on reset generation. It may replace two discrete voltage supervisors such as MIC1810, MIC1815, MIC809, MIC811, MIC6315, etc. The two voltage supervisors are completely independent. Each functional block features an under-voltage detector, a delay-generator, and a de-bounced manual reset input ...

Page 2

... Micrel Ordering Information Part Number Standard MIC2772-L2L3YML MIC2772-M2M3YML (1) MIC2772-L3L3BML MIC2772-L3L3YML (1) MIC2772-M3M3BML MIC2772-M3M3YML (1) MIC2772-T3T3BML MIC2772-T3T3YML (1) MIC2772-S3S3BML MIC2772-S3S3YML MIC2772-T2T3YML MIC2772-S2S3YML MIC2772-L3T3YML MIC2772-M3S3YML : Note 1. Available now. 2. Contact factory. Pin Configuration April 2005 Top Mark Pb-Free Standard Pb-Free (2) (2) (1) UP2 (1) UP3 (1) UP4 (1) UP5 (2) (2) (2) (2) ...

Page 3

... Digital Output; open-drain; supervisor 1. Asserted low whenever VCC1 falls below the threshold voltage. It remains asserted for no less than t de-asserted after VCC1 returns above the threshold. Analog Input. Power supply input for supervisor 1. 3 MIC2772 later. /MR1 may RESET1 later. /MR2 RESET2 ...

Page 4

... CCn SINK ≥ 2.5V 1.2mA CCn SINK ≥ 1V µ CCn SINK /RESET not asserted V > 4.0V THn V < 4.0V THn V > 4.0V THn V < 4.0V THn 4 MIC2772 (2) ° ° ).... - + )................ 93°C/W JA ≤ T ≤ MIN A MAX Min Typ Max Units 30 10 µ µA ...

Page 5

... Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Timing Diagram V CCn /MR n /RESET n April 2005 Condition → /RESETn < V /MRn < Reset Occurs No Reset Occurs RST MIC2772 Timing Diagram 5 MIC2772 Min Typ Max Units 0.5 10 100 RST M9999-042605 (408) 955-1690 µs µ ...

Page 6

... MOSFET structure. A pull-up resistor must be used to pull this output to some voltage. For most applications, this voltage will be the same power supply that supplies VCC to MIC2772 possible however to tie this resistor to some other voltage. This will allow the MIC2772 to monitor one voltage while level-shifting the /RESET output to some other voltage ...

Page 7

... The data was taken by adding negative-going square-wave pulse input voltage set at 0.5V above actual measured threshold for the part being characterized. Figure 1 shows the graph for the MIC2772[UP3] and Figure 2 shows the graph for the MIC2772[UP5] Typical Transient Response ...

Page 8

... Micrel April 2005 8 MIC2772 M9999-042605 (408) 955-1690 ...

Page 9

... A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. April 2005 8-Pin 2mm X 2mm MLF (ML) © 2005 Micrel, Incorporated. 9 MIC2772 M9999-042605 (408) 955-1690 ...

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