Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - power supply controllers/monitors 23 µA SOT 23 6

General Description

The MAX16052/MAX16053 are a family of small, low-

power, high-voltage monitoring circuits with sequencing

capability. These miniature devices offer very wide flex-

ibility with an adjustable voltage threshold and an external

capacitor-adjustable time delay. These devices are ideal

for use in power-supply sequencing, reset sequencing,

and power switching applications. Multiple devices can be

cascaded for complex sequencing applications.

A high-impedance input (IN) with a 0.5V threshold allows

an external resistive divider to set the monitored thresh-

old. The output (OUT) asserts high when the input volt-

age rises above the 0.5V threshold and the enable

input (EN) is asserted high. When the voltage at IN falls

below 0.495V or when the enable input is deasserted

(EN = low), the output deasserts (OUT = low). The MAX16052/

MAX16053 provide a capacitor programmable delay time

from when the voltage at IN rises above 0.5V to when the

output is asserted.

The MAX16052 offers an active-high open-drain output while

the MAX16053 offers an active-high push-pull output. Both

devices operate from a 2.25V to 28V supply voltage and fea-

ture an active-high enable input. The MAX16052/MAX16053

are available in a tiny 6-pin SOT23 package and are fully speci-

fied over the automotive temperature range (-40°C to +125°C).

Applications

Features

● 1.8% Accurate Adjustable Threshold Over

Temperature

● Open-Drain (28V Tolerant) Output Allows Interfacing

to 12V Intermediate Bus Voltage

● Operates from V

of 2.25V to 28V

● Low Supply Current (18μA typ)

● Capacitor-Adjustable Delay

● Active-High Logic-Enable Input

● Fully Specified from -40°C to +125°C

● Small 6-Pin SOT23 Package

● Medical Equipment

● Intelligent Instruments

● Portable Equipment

● Computers/Servers

● Critical μP Monitoring

● Set-Top Boxes

● Telecom

Note: All devices operate over the -40°C to +125°C operating

automotive temperature range.

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel, offered in 2.5k increments.

PART OUTPUT

PIN-

PACKAGE

TOP

MARK

MAX16052AUT+T Open-Drain 6 SOT23 +ACLW

MAX16053AUT+T Push-Pull 6 SOT23 +ACLX

DC-DC

CONVERTER

DC-DC

CONVERTER

OUT

GND

CDELAY

OUT

GND

CDELAY

OUT

12V

0.9V

MAX16052

GND

OUTIN

1 6CDELAY

MAX16052

MAX16053

SOT23

TOP VIEW

3 4

MAX16052/MAX16053 High-Voltage, Adjustable

Sequencing/Supervisory Circuits

19-4144; Rev 3; 4/14

Typical Operating Circuit

Ordering Information

Pin Conguration

EVALUATION KIT AVAILABLE

Summary of content (12 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits General Description The MAX16052/MAX16053 are a family of small, lowpower, high-voltage monitoring circuits with sequencing capability. These miniature devices offer very wide flexibility with an adjustable voltage threshold and an external capacitor-adjustable time delay. These devices are ideal for use in power-supply sequencing, reset sequencing, and power switching applications.
PAGE 2
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits Absolute Maximum Ratings (All voltages referenced to GND.) VCC........................................................................-0.3V to +30V OUT (push-pull, MAX16053).....................-0.3V to (VCC + 0.3V) OUT (open-drain, MAX16052)................................-0.3V to +30V EN, IN ........................................................-0.3V to (VCC + 0.3V) CDELAY........................................................
PAGE 3
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits Electrical Characteristics (continued) (VCC = 2.25V to 28V, VEN = VCC, TA = TJ = -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS TIMING VCC = 3.
PAGE 4
MAX16052/MAX16053 VCC High-Voltage, Adjustable Sequencing/Supervisory Circuits VUVLO VTH + 25mV VTH - VHYST IN VTH t < tPROP EN VIH VIH VIH VIL VIL 5% VIH t < tMPW t > tMPW VOH OUT VOL tPROP tDL tDELAY tOFF tPROP Figure 1. MAX16052/MAX16053 Timing Diagram (CCDELAY = 0) www.maximintegrated.
PAGE 5
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits Typical Operating Characteristics (VCC = 3.3V and TA = +25°C, unless otherwise noted.) MAX16052 VIN = 0V 30 27 24 21 18 15 36 32 12 VCC = 28V 28 VCC = 12V 24 20 9 16 6 3 12 VCC = 3.3V VCC = 2.25V 8 0 8 4 12 16 20 24 4 28 -40 -25 -10 5 20 35 50 65 80 95 110 125 VCC (V) 500.5 500.0 499.5 499.0 3000 2500 2000 1500 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 CCDELAY (nF) OUTPUT LOW VOLTAGE vs.
PAGE 6
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits Typical Operating Characteristics (continued) (VCC = 3.3V and TA = +25°C, unless otherwise noted.) 250 ENABLE TURN-OFF DELAY (MAX16053) MAX16052/53 toc08 MAX16052/53 toc07 300 MAX16052/53 toc09 EN 2V/div 200 EN 2V/div RESET OCCURS ABOVE THIS CURVE 150 OUT 2V/div OUT 2V/div 100 50 1 10 100 1000 10µs/div INPUT OVERDRIVE (mV) IN LEAKAGE CURRENT (mA) 8 6 IN LEAKAGE CURRENT vs.
PAGE 7
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits Typical Operating Characteristics (continued) (VCC = 3.3V and TA = +25°C, unless otherwise noted.) 4 2 0 -2 -4 -6 1.0 VCC = 28V VCC = VIN 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -8 -10 EN LEAKAGE CURRENT vs. EN VOLTAGE MAX16052/53 toc13 6 VCC = 28V VCC = VEN = VIN EN LEAKAGE CURRENT (nA) EN LEAKAGE CURRENT (nA) 8 MAX16052/53 toc12 10 EN LEAKAGE CURRENT vs. TEMPERATURE -40 -25 -10 5 20 35 50 65 80 95 110 125 -1.
PAGE 8
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits VCC REF VCC INTERNAL VCC/UVLO IN OUT 0.5V INTERNAL VCC/UVLO REF IN 0.5V CONTROL LOGIC EN GND CONTROL LOGIC EN OUT 250nA 250nA 1.0V 1.0V GND MAX16053 MAX16052 CDELAY CDELAY Figure 2. Simplified Functional Diagram Detailed Description The MAX16052/MAX16053 family of high-voltage, sequencing/supervisory circuits provide adjustable voltage monitoring for inputs down to 0.5V.
PAGE 9
MAX16052/MAX16053 Monitor Input (IN) Connect the center point of a resistive divider to IN to monitor external voltages (see R1 and R2 of Figure 4). IN has a rising threshold of VTH = 0.5V and a falling threshold of 0.495V (5mV hysteresis). When VIN rises above VTH and EN is high, OUT goes high after the adjustable tDELAY period. When VIN falls below 0.495V, OUT goes low after a 18μs delay.
PAGE 10
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits Typical Application Circuits Figures 4–6 show typical applications for the MAX16052/ MAX16053. Figure 4 shows the MAX16052 used with a p-channel MOSFET in an overvoltage protection circuit. Figure 5 shows the MAX16053 in a lowvoltage sequencing application using an n-channel MOSFET. Figure 6 shows the MAX16053 used in a multiple output sequencing application.
PAGE 11
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits 2.5V 3.3V DC-DC 5V BUS DC-DC EN 1.2V 1.8V DC-DC EN DC-DC EN EN SYSTEM ENABLE EN IN VCC MAX16053 EN OUT IN VCC MAX16053 EN OUT GND GND CCDELAY IN VCC MAX16053 EN IN OUT GND CCDELAY VCC MAX16053 OUT GND CCDELAY CCDELAY Figure 6. Multiple Output Sequencing Chip Information PROCESS: BiCMOS www.maximintegrated.
PAGE 12
MAX16052/MAX16053 High-Voltage, Adjustable Sequencing/Supervisory Circuits Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 0 5/08 Initial release 1 10/08 Update Adjustable Delay (CDELAY) and Power-Supply Bypassing sections. 2 1/10 Revised the Features, General Description, Absolute Maximum Ratings, Electrical Characteristics, Typical Operating Characteristics, Pin Description, and the Supply Input (VCC) sections.