LM3705XCBP-308 datasheet, PDF - EEWORLD Datasheet

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LM3705XCBP-308: Description1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA9, MICRO SMD, BUMP PACKAGE, 9 PIN; CategoryPower/power management The power supply circuit; File Size998KB，18 Pages; ManufacturerRochester Electronics; Websitehttps://www.rocelec.com/

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LM3705XCBP-308 Overview

1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA9, MICRO SMD, BUMP PACKAGE, 9 PIN

LM3705XCBP-308 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Rochester Electronics
Parts packaging code	BGA
package instruction	MICRO SMD, BUMP PACKAGE, 9 PIN
Contacts	9
Reach Compliance Code	unknown
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	S-PBGA-B9
JESD-609 code	e0
length	1.412 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	9
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	FBGA
Package shape	SQUARE
Package form	GRID ARRAY, FINE PITCH
Peak Reflow Temperature (Celsius)	260
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	1.2 V
Nominal supply voltage (Vsup)	1.8 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal surface	TIN LEAD
Terminal form	BALL
Terminal pitch	0.5 mm
Terminal location	BOTTOM
Maximum time at peak reflow temperature	40
width	1.412 mm

LM3705XCBP-308 Preview

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LM3704/LM3705 Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output and

Manual Reset

July 2002

LM3704/LM3705

Microprocessor Supervisory Circuits with Power Fail

Input, Low Line Output and Manual Reset

General Description

The LM3704/LM3705 series of microprocessor supervisory

circuits provide the maximum flexibility for monitoring power

supplies and battery controlled functions in systems without

backup batteries. The LM3704/LM3705 series are available

in MSOP-10 and 9-bump micro SMD packages.

Built-in features include the following:

Reset: Reset is asserted during power-up, power-down, and

brownout conditions. RESET is guaranteed down to V

1.0V.

Manual Reset Input: An input that asserts reset when pulled

low.

Power-Fail Input: A 1.225V threshold detector for power fail

warning, or to monitor a power supply other than V

Low Line Output: This early power failure warning indicator

goes low when the supply voltage drops to a value which is

2% higher than the reset threshold voltage.

No external components required

Manual-Reset input

RESET (LM3704) or RESET (LM3705) outputs

Precision supply voltage monitor

Factory programmable Reset Timeout Delay

Separate Power Fail comparator

Available in micro SMD package for minimum footprint

0.5% Reset threshold accuracy at room temperature

2% Reset threshold accuracy over temperature

extremes

Reset assertion down to 1V V

(RESET option only)

28 µA V

supply current

Applications

Embedded Controllers and Processors

Intelligent Instruments

Automotive Systems

Critical µP Power Monitoring

Features

Standard Reset Threshold voltage: 3.08V

Custom Reset Threshold voltages: For other voltages

between 2.2V and 5.0V in 10mV increments, contact

National Semiconductor Corp.

Typical Application

10136903

DS101369

www.national.com

LM3704/LM3705

Connection Diagram

Top View

(looking from the coating side)

micro SMD 9 Bump Package

BPA09

MSOP-10

10136902

10136901

Pin Description

Pin No.

micro

SMD

MSOP

Name

RESET

Function

Manual-Reset input. When MR is less than V

MRT

(Manual Reset Threshold)

RESET/RESET is engaged.

Power Supply input.

Reset Logic Output. Pulses low for t

(Reset Timeout Period) when triggered, and stays

low whenever V

is below the reset threshold or when MR is below V

MRT

. It remains low

for t

after either V

rises above the reset threshold, or after MR input rises above

MRT

(LM3704 only).

Reset Logic Output. RESET is the inverse of RESET (LM3705 only).

Power-Fail Logic Output. When PFI is below V

PFT

, PFO goes low; otherwise, PFO

remains high.

Low-Line Logic Output. Early Power-Fail warning output. Low when V

falls below V

LLOT

(Low-Line Output Threshold). This output can be used to generate an NMI (Non-Maskable

Interrupt) to provide an early warning of imminent power-failure.

Ground reference for all signals.

No Connect.

Power-Fail Comparator Input. When PFI is less than V

PFT

(Power-Fail Reset Threshold),

the PFO goes low; otherwise, PFO remains high.

No Connect. Test input used at factory only. Leave floating.

RESET

PFO

LLO

4, 6

GND

PFI

www.national.com

LM3704/LM3705

Block Diagram

10136926

www.national.com

LM3704/LM3705

Ordering Information

10136904

For other voltages between 2.2V and 5.0V, please contact National Semiconductor sales office.

LM3704/LM3705

Part Number

LM3704XCBP-308

LM3704XCBPX-308

LM3704XCMM-308

LM3704XCMMX-308

LM3705XCBP-308

LM3705XCBPX-308

LM3705XCMM-308

LM3705XCMMX-308

Output

totem-pole

Reset Timeout

Period

200ms

Package

MSOP

micro

SMD

Package

Marking

%%I4

R35B

%%I5

R36B

%% is the datecode and will vary with time.

Table Of Functions

Part

Number

LM3704

LM3705

Active

Low

Reset

Active

High

Reset

Output

(X = totem-pole)

(Y = open-drain)

X, Y

Reset

Timeout

Period

Customized

Manual

Reset

Power Fail

Comparator

Low

Line

Output

= available upon request. Contact National

www.national.com

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LM3705XCBP-308 Related Products

	LM3705XCBP-308	LM3705XCBPX-308
Description	1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA9, MICRO SMD, BUMP PACKAGE, 9 PIN	1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA9, MICRO SMD, BUMP PACKAGE, 9 PIN
Is it lead-free?	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible
Maker	Rochester Electronics	Rochester Electronics
Parts packaging code	BGA	BGA
package instruction	MICRO SMD, BUMP PACKAGE, 9 PIN	MICRO SMD, BUMP PACKAGE, 9 PIN
Contacts	9	9
Reach Compliance Code	unknown	unknown
Adjustable threshold	NO	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	S-PBGA-B9	S-PBGA-B9
JESD-609 code	e0	e0
length	1.412 mm	1.412 mm
Humidity sensitivity level	1	1
Number of channels	1	1
Number of functions	1	1
Number of terminals	9	9
Maximum operating temperature	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	FBGA	FBGA
Package shape	SQUARE	SQUARE
Package form	GRID ARRAY, FINE PITCH	GRID ARRAY, FINE PITCH
Peak Reflow Temperature (Celsius)	260	260
Maximum supply voltage (Vsup)	5.5 V	5.5 V
Minimum supply voltage (Vsup)	1.2 V	1.2 V
Nominal supply voltage (Vsup)	1.8 V	1.8 V
surface mount	YES	YES
Temperature level	INDUSTRIAL	INDUSTRIAL
Terminal surface	TIN LEAD	TIN LEAD
Terminal form	BALL	BALL
Terminal pitch	0.5 mm	0.5 mm
Terminal location	BOTTOM	BOTTOM
Maximum time at peak reflow temperature	40	40
width	1.412 mm	1.412 mm

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