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MIC2774L-31BM5

Description
Power Supply Support Circuit Adjustable 2 Channel PDSO5
CategoryPower/power management    The power supply circuit   
File Size379KB,8 Pages
ManufacturerMicrel ( Microchip )
Websitehttps://www.microchip.com
Download Datasheet Parametric View All

MIC2774L-31BM5 Overview

Power Supply Support Circuit Adjustable 2 Channel PDSO5

MIC2774L-31BM5 Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerMicrel ( Microchip )
package instructionSOT-23, 5 PIN
Reach Compliance Code_compli
Factory Lead Time1 week
Other featuresNOMINAL THRESHOLDVOLTAGE IS 3.09; MANUAL RESET INPUT
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G5
JESD-609 codee0
length2.9 mm
Humidity sensitivity level1
Number of channels2
Number of functions1
Number of terminals5
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeLSSOP
Encapsulate equivalent codeTSOP5/6,.11,37
Package shapeRECTANGULAR
Package formSMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)240
power supply3.3 V
Certification statusNot Qualified
Maximum seat height1.45 mm
Maximum supply voltage (Vsup)3.465 V
Minimum supply voltage (Vsup)3.135 V
Nominal supply voltage (Vsup)3.3 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn85Pb15)
Terminal formGULL WING
Terminal pitch0.95 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width1.6 mm
MIC2774
Micrel
MIC2774
Dual Micro-Power Low Voltage Supervisor
Advance Information
General Description
The MIC2774 is a dual power supply supervisor that provides
under-voltage monitoring, manual reset capability, and power-
on reset generation in a compact 5-pin SOT package. Fea-
tures include two under-voltage detectors, one fixed and one
adjustable, and a choice of reset outputs. One under-voltage
detector compares V
DD
against a fixed threshold. Ten fac-
tory-programmed thresholds are available. The second, user-
adjustable input is compared against a 300mV reference.
This low reference voltage allows monitoring voltages lower
than those supported by previous supervisor ICs.
The reset outputs are asserted at power-on and any time
either voltage drops below the programmed threshold volt-
ages and remains asserted for 140ms (min.) after they
subsequently rise back above the threshold boundaries.
Manual reset functionality can be provided by a switch
connected between ground and the /MR input. A wide choice
of voltage thresholds provides for a variety of supply voltages
and tolerances. Hysteresis is included to prevent chattering
due to noise. Typical supply current is a low 3.5µA.
Features
• Monitors two independent power supplies for under-
voltage conditions
• One fixed and one user adjustable input
• Choice of factory-programmed thresholds
• Adjustable input can monitor supplies as low as 0.3V
• Generates 140ms (minimum) power-on reset pulse
• Manual reset input
• Choice of active-high, active-low, or open-drain active-
low reset outputs
• Inputs may be pulled above V
DD
(7V abs. max.)
• Open-drain output can be pulled above V
DD
(7V abs
max.)
• /RST output valid down to 1.2V
• Ultra-low supply current, 3.5µA typical
• Rejects brief input transients
• IttyBitty™ 5-lead SOT-23 package
• Pin compatible upgrade for MAX6306/09/12
Applications
• Monitoring processor ASIC, or FAGA core and I/O
voltages
• PDAs, hand-held PCs
• Embedded controllers
• Telecommunications systems
• Power supplies
• Wireless / Cellular systems
• Networking hardware
Ordering Information
Part Number
MIC2774N-XXBM5
MIC2774H-XXBM5
MIC2774L-XXBM5
Marking
UGXX
UHXX
UIXX
Reset Output
Open-Drain, Active-Low (/RST)
Active-High, Complementary (RST)
Active-Low, Complementary (/RST)
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
Typical Application
V
CORE
1.0V
V
I/O
2.5V
R1
R2
Power_Good
/MR
Manual
Reset
GND
MICROPROCESSOR
VCORE
VI/O
MIC2774L-23
VDD /RST
IN
/RESET GND
IttyBitty™ is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
September 29, 2000
1
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