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MAX6886ETP+T

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
The MAX6886 pin-selectable, multivoltage supply
supervisor monitors six voltage-detector inputs and one
watchdog input, asserting a RESET when inputs drop
below the selected voltage thresholds or the watchdog
timer expires. Manual reset and margin disable inputs
offer additional flexibility.
Five logic inputs select the MAX6886 thresholds. Logic
inputs select a supply tolerance (5% or 10%) and 1 of
32 factory-set threshold settings. Connect external
capacitors or use the factory default setting to set the
watchdog timeout periods and reset time delay.
The MAX6886 is available in a 20-pin TQFN (5mm x
5mm x 0.8mm) package and operates over the extend-
ed -40°C to +85°C temperature range.
Applications
Multivoltage Systems
Telecom
Networking
Servers/Workstations/Storage Systems
Features
o 32 Pin-Selectable Undervoltage Detector
Thresholds
o Capacitor-Adjustable Reset and Watchdog
Timeout Periods
o Factory Default Reset and Watchdog Timeout
Periods
o Margining Disable and Manual Reset Controls
o -40°C to +85°C Operating Temperature Range
o Small 5mm x 5mm 20-Pin Thin QFN Package
o Few External Components
o ±1% Threshold Accuracy
MAX6886
Pin-Selectable, Hex Power-Supply
Supervisory Circuit
________________________________________________________________
Maxim Integrated Products
1
PART TEMP RANGE PIN-PACKAGE
MAX6886ETP+ -40°C to +85°C 20 TQFN-EP*
Ordering Information
MARGIN
V
CC
WDI
LOGIC OUTPUT
GND
µP
DC-DC
1
3.3V ALWAYS ON
TH4
DBP
TH3
TH2
TH1
TH0
DC-DC
2
DC-DC
3
DC-DC
4
IN1 IN2
SRT
IN3
SWT
IN4
1.5V
IN5 IN6
12V
MR
RESET
RESET
12V
5V
3.3V
2.5V
1.8V
MAX6886
1.2V
Typical Operating Circuit
19-3587; Rev 1; 1/12
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Pin Configuration appears at end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
MAX6886
Pin-Selectable, Hex Power-Supply
Supervisory Circuit
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN1
–V
IN4
or V
CC
= 2.7V to 5.8V, WDI = GND, TH0–TH4 = MARGIN = MR = DBP, T
A
= -40°C to +85°C, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Notes 1, 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
(All voltages referenced to GND.)
IN1–IN6, V
CC
, RESET, SRT, SWT.............................-0.3V to +6V
TH0–TH4, WDI, MR, MARGIN ..................................-0.3V to +6V
DBP ..........................................................................-0.3V to +3V
Input/Output Current (all pins)..........................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin 5mm x 5mm Thin QFN
(derate 21.3mW/°C above +70°C).............................1702mW
Maximum Junction Temperature .....................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Operating Voltage Range
(Note 3)
Voltage on either one of IN1–IN4 or V
CC
to
guarantee the part is fully operational
2.7 5.8 V
Supply Current I
CC
V
IN1
= 5.8V, IN2–IN6 = GND, no load 0.9 1.2 mA
Digital Bypass Voltage V
DBP
2.48 2.55 2.67
V
T
A
= +25
o
C to +85
o
C
-1 +1
Threshold Accuracy (Table 2) V
TH
IN1–IN6, V
IN
_ falling
T
A
= -40
o
C to +85
o
C -1.5 +1.5
% V
TH
Threshold Hysteresis
V
TH-HYS
0.3
% V
TH
Threshold Tempco
∆V
TH
/°C
10
ppm/°C
IN_ Input Impedance R
IN
For V
IN_
< highest V
IN1–IN4
and V
IN_
< V
CC
(not ADJ), thresholds are not set as
adjustable
130 200 300
kΩ
IN5, IN6
IN_ Input Leakage Current I
IN
IN1–IN4 set as ad
j
ustable thresholds
-150 +150
nA
Power-Up Delay t
D-PO
V
CC
≥ 2.5V 2.5 ms
IN_ to RESET Delay t
D-R
IN_ falling/rising, 100mV overdrive 20 µs
Reset Default Timeout Period t
RP
V
SRT
= V
CC
180 200 220
ms
Reset Adjustable Timeout Period
t
RP-ADJ
C
SRT
= 47nF
135 207 280
ms
SRT Adjustable Timeout Current I
SRT
V
SRT
= V
GND
180 230 280
nA
SRT Default Timeout Threshold
V
SRT-DEF
V
SRT
≥ V
SRT-DEF
, selects reset default
1.1
1.25
1.5 V
SRT Adjustable Timeout
Threshold
V
SRT-ADJ
(Note 4)
0.95 1.00 1.05
V
SRT Adjustable Timeout
Discharge Threshold
V
SRT-DIS
(Note 5)
100
mV
SRT Adjustable Timeout Output-
Low Discharge Current
I
SRT-DIS
V
SRT
= 0.3V 0.7 mA
RESET Output Low
V
OLRESET
I
SINK
= 4mA, output asserted 0.4 V
RESET Output Open-Drain
Leakage Current
I
LKG
Output tri-stated -1 +1 µA
MAX6886
Pin-Selectable, Hex Power-Supply
Supervisory Circuit
_______________________________________________________________________________________ 3
Note 1: Device may be supplied from IN1–IN4 or V
CC
.
Note 2: 100% production tested at T
A
= +25°C and T
A
= +85°C. Specifications at T
A
= -40°C are guaranteed by design.
Note 3: The internal supply voltage, measured at V
CC
, equals the maximum of IN1–IN4.
Note 4: External capacitor is charged by I
S_T
when V
S_T-DIS
< V
S_T
< V
S_T-ADJ
.
Note 5: External capacitor is discharged by I
S_T-DIS
down to V
S_T-DIS
after V
S_T
reaches V
S_T-ADJ
.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN1
–V
IN4
or V
CC
= 2.7V to 5.8V, WDI = GND, TH0–TH4 = MARGIN = MR = DBP, T
A
= -40°C to +85°C, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
V
IL
0.6
MR, MARGIN, TH0–TH4, WDI
Input Voltage
V
IH
1.4
V
MR Input Pulse Width t
MR
1µs
MR Glitch Rejection
100
ns
MR to RESET Delay t
D-MR
200
ns
MR to Internal DBP Pullup
Current
I
MR
V
MR
= 1.4V 5 10 15 µA
MARGIN to Internal DBP Pullup
Current
I
MARGIN
V
MARGIN
= 1.4V 5 10 15 µA
TH0–TH4 Input Current
-100 +100
nA
WDI Pulldown Current I
WDI
V
WDI
= 0.6V 5 10 15 µA
WDI Input Pulse Width t
WDI
50 ns
Initial mode
92.16 102.4 112.64
Watchdog Default Timeout Period
t
WD
V
SWT
= V
CC
Normal mode
1.44
1.6
1.76
s
Initial mode
53.7 82.5 111.9
Watchdog Adjustable Timeout
Period
t
WD-ADJ
C
SWT
= 0.33µF
Normal mode
0.93 1.43 1.94
s
SWT Adjustable Timeout Current
I
SWT
SWT = GND
180 230 280
nA
SWT Default Timeout Threshold
V
SWT-DEF
V
SWT
≥ V
SWT-DEF
, selects watchdog default
timeout
1.1
1.25
1.5 V
SWT Adjustable Timeout
Threshold
V
SWT-ADJ
(Note 4)
0.95 1.00 1.05
V
SWT Adjustable Timeout
Discharge Threshold
V
SWT-DIS
(Note 5)
100
mV
SWT Adjustable Timeout Output-
Low Discharge Current
I
SWT-DIS
V
SWT
= 0.3V 0.7 mA
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX6886ETP+T

Mfr. #:
Buy MAX6886ETP+T
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits Pin-Selectable Hex Power-Sup Supervisor
Lifecycle:
New from this manufacturer.
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