Datasheet

ManualsBrandsANALOG DEVICES ManualsPMICsPMIC - system monitor Reset/power-on reset SOT 143 4

Open-Drain Microprocessor

Supervisory Circuit in 4-Lead SOT-143

Data Sheet

ADM6315

Rev. G Document Feedback

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FEATURES

Specified over temperature

Low power consumption (5 μA typical)

Precision voltage monitor of voltages from 2.5 V to 5 V

at 100 mV increments

Reset assertion down to V

> 1 V

Reset timeout periods: 1 ms, 20 ms, 140 ms,

or 1120 ms (minimum)

Built-in manual reset

Pin compatible with the ADM811

Available in SOT-143 package

Qualified for automotive applications

APPLICATIONS

Microprocessor systems

Controllers

Intelligent instruments

Automotive systems

Safety systems

Portable instruments

FUNCTIONAL BLOCK DIAGRAM

DEBOUNCE

ADM6315

GND

RESET

REF

RESET

CIRCUITRY

00081-001

Figure 1.

ADM6315

GND GND

10kΩ

SYSTEM POWER

MICROPROCESSOR

SYSTEM

00081-011

RESET

Figure 2. Typical Operating Circuit

GENERAL DESCRIPTION

The ADM6315 is a reliable voltage-monitoring device that is

suitable for use in most voltage-monitoring applications.

The ADM6315 is designed to monitor as little as a 1.8%

degradation of a power supply voltage. The ADM6315 can

monitor all voltages (at 100 mV increments) from 2.5 V to 5 V.

Included in this circuit is a debounced manual reset input.

RESET

can be activated using an ordinary switch (pulling

low), a low input from another digital device, or a degradation

of the supply voltage.

The manual reset function is very useful, especially if the circuit

in which the ADM6315 is operating enters into a state that can

be detected only by the user. Allowing the user to reset a system

manually can reduce the damage or danger that could otherwise

be caused by an out-of-control or locked-up system.

The ADM6315 is available in a cost- and space-efficient

SOT-143 package.

Summary of content (12 pages)

PAGE 1
Data Sheet Open-Drain Microprocessor Supervisory Circuit in 4-Lead SOT-143 ADM6315 FEATURES FUNCTIONAL BLOCK DIAGRAM VCC GND VREF ADM6315 RESET RESET CIRCUITRY MR DEBOUNCE 00081-001 Specified over temperature Low power consumption (5 μA typical) Precision voltage monitor of voltages from 2.
PAGE 2
ADM6315 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................6 Applications ....................................................................................... 1 Theory of Operation .........................................................................7 Functional Block Diagram ........................................................
PAGE 3
Data Sheet ADM6315 SPECIFICATIONS VCC = full operating range, TA = TMIN to TMAX, VCC typical = 5 V, unless otherwise noted. Table 1. Parameter SUPPLY Operating Voltage VCC Supply Current Min Typ 1 Max Unit Test Conditions/Comments 5.5 12 15 10 12 VTH + 1.8% VTH + 2.5% VTH + 3.5% TA = −40°C to +85°C VCC = 5.5 V, no load, TA = −40°C to +85°C VCC = 5.5 V, no load, TA = −40°C to +125°C VCC = 3.6 V, no load, TA = −40°C to +85°C VCC = 3.
PAGE 4
ADM6315 Data Sheet ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. THERMAL RESISTANCE Table 2. Rating θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. −0.3 V to +6 V −0.
PAGE 5
Data Sheet ADM6315 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS RESET 2 ADM6315 TOP VIEW (Not to Scale) 4 VCC 3 MR 00081-002 GND 1 Figure 3. Pin Configuration Table 4. Pin Function Descriptions Pin No. 1 2 Mnemonic GND RESET 3 MR 4 VCC Description Ground Reference for All Signals, 0 V. Active Low Logic Output. RESET remains low while VCC is below the reset threshold or when MR is low.
PAGE 6
ADM6315 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 50 8 IDD (µA) VCC = 5.5V 6 VCC = 3V 4 2 –20 20 0 40 60 80 100 125 TEMPERATURE (°C) 35 30 25 20 15 10 5 0 100 200 300 400 500 600 700 800 900 1000 RESET COMPARATOR OVERDRIVE, (VTH – VCC) (mV) Figure 4. Supply Current vs. Temperature Figure 7. Maximum Transient Duration vs. RESET Comparator Overdrive 450 1.
PAGE 7
Data Sheet ADM6315 THEORY OF OPERATION INTERFACING TO OUTPUT OF OTHER DEVICES MANUAL RESET INPUT The ADM6315 series is designed to integrate with as many devices as possible. One feature of the ADM6315 is the RESET open-drain output, which can sink current from sources with a voltage greater than the VCC of the ADM6315 input, making it suitable for use in more diverse applications. The ADM6315 also provides an additional input, MR.
PAGE 8
ADM6315 Data Sheet OUTLINE DIMENSIONS 3.04 2.90 2.80 1.92 BSC 0.20 BSC 4 1.40 1.30 1.20 3 1 2.64 2.10 2 1.72 REF 1.07 0.90 0.75 0.100 0.013 0.89 0.76 0.50 0.30 0.20 0.08 SEATING PLANE 8° 0° 0.54 REF 0.60 0.50 0.40 COMPLIANT TO JEDEC STANDARDS TO-253-AA 03-13-2012-B 1.22 0.80 Figure 12.
PAGE 9
Data Sheet Model1, 2 ADM6315-29D2ARTRL7 ADM6315-29D2ART-RL ADM6315-29D2ARTZR7 ADM6315-26D2ARTRL7 ADM6315-26D2ARTZR7 ADM6315-26D2ARTZRL ADM6315-46D3ARTRL7 ADM6315-46D3ART-RL ADM6315-46D3ARTZR7 ADM6315-45D3ARTRL7 ADM6315-45D3ART-RL ADM6315-45D3ARTZR7 ADM6315-44D3ARTRL7 ADM6315-44D3ARTZR7 ADM6315-44D3ARTZRL ADM6315-31D3ARTRL7 ADM6315-31D3ART-RL ADM6315-31D3ARTZR7 ADM6315-31D3ARTZRL ADM6315-29D3ARTRL7 ADM6315-29D3ART-RL ADM6315-29D3ARTZR7 ADM6315-26D3ARTZR7 ADM6315-26D3ARTZRL ADM6315-46D4ARTRL7 ADM6315-46D4ART
PAGE 10
ADM6315 Data Sheet NOTES Rev.
PAGE 11
Data Sheet ADM6315 NOTES Rev.