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Supervisory Circuit. PT7M7433 Datasheet

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Supervisory Circuit. PT7M7433 Datasheet






PT7M7433 Circuit. Datasheet pdf. Equivalent




PT7M7433 Circuit. Datasheet pdf. Equivalent





Part

PT7M7433

Description

uP Supervisory Circuit



Feature


PT7M7433/34/35 ||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||| ||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| |||||||||||| |||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||.
Manufacture

Pericom Technology

Datasheet
Download PT7M7433 Datasheet


Pericom Technology PT7M7433

PT7M7433; ||| ||||||||||||||||| P Supervisory C ircuit Features Description User-Ad justable Low/High Thresholds with 615mV The PT7M7433/34/35 are single-level b attery monitors Internal Reference Lo w Current (1.5μA typ) SOT23-3 Single Low-Battery Outputs with internal hyst eresis. These devices are offered with PT7M7427xx single low-battery output in dicators which can be.


Pericom Technology PT7M7433

used PT7M7428xx to indicate three bPaTt t7eMry74c29oxnxditions: good (operate Push-Pull LBO, Open-Drain LBO and 1OpL eBnO-Drain system in normal m1odLeB)O, weak (operate system in low- LBO optio ns power mode), or empty (disable the system). 90ms Minimum LBO Timeout Per iod GND 3The PT7M7433/34/35 are GuNsDe r-3adjustable threshold Immune to Sho rt Battery Voltage.


Pericom Technology PT7M7433

Transient2s BATT -40°C to + 85°C Ope rating Temperature Range voltages perm itting the user to select the hysteresi s range and conseque2ntlByATtThe sensit ivity of the system to noise. A wide h ysteresis range also prevents chatterin g Application SOT23-5 PT7M7430xx tha t can result due to battery recovery af ter load PT7M7431xx removal. PT7M7432 xx Monitoring lith.

Part

PT7M7433

Description

uP Supervisory Circuit



Feature


PT7M7433/34/35 ||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||| ||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| |||||||||||| |||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||.
Manufacture

Pericom Technology

Datasheet
Download PT7M7433 Datasheet




 PT7M7433
PT7M7433/34/35
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||
P Supervisory Circuit
Features
Description
User-Adjustable Low/High Thresholds with 615mV
The PT7M7433/34/35 are single-level battery monitors
Internal Reference
Low Current (1.5μA typ) SOT23-3
Single Low-Battery Outputs
with internal hysteresis. These devices are offered with
PT7M7427xx single low-battery output indicators which can be used
PT7M7428xx to indicate three bPaTtt7eMry74c29oxnxditions: good (operate
Push-Pull LBO, Open-Drain LBO and 1OpLeBnO-Drain system in normal m1odLeB)O, weak (operate system in low-
LBO options
power mode), or empty (disable the system).
90ms Minimum LBO Timeout Period
GND 3The PT7M7433/34/35 are GuNsDer-3adjustable threshold
Immune to Short Battery Voltage Transient2s BATT
-40°C to + 85°C Operating Temperature Range
voltages permitting the user to select the hysteresis
range and conseque2ntlByATtThe sensitivity of the system to
noise. A wide hysteresis range also prevents chattering
Application
SOT23-5
PT7M7430xx that can result due to battery recovery after load
PT7M7431xx removal.
PT7M7432xx
Monitoring lithiumion (Li+) cells or multicell alkaline/
1 GND LBOL 5
1 GND LBOL 5
NiCd/ NiMH power supplies.
2 NC
2 NC
Pin Configuration
3 LBOH BATT 4
3 LBOH BATT 4
PT7M7433
PT7M7434
1 HTHIN VCC 5
PT7M7435
1 HTHIN VCC 5
PT7M7479H
PT7M7479L
1 HTH VDD 5
2 GND
3 LTHIN LBO 4
2 GND
3 LTHIN LBO 4
2 GND
3 LTH
RST
(/RST) 4
Pin Description
Pin Name
SOT23-6
PT7M7436
PT7M7437
Type
PT7M7438
Description
PT7M3806M
PT7M3806E
1
HTHIN
1
I
HTHINHTVHCCTh6reshold Mon1 itoHrTHInINputV.CAC re6sistor-divider1 neRtSwTSoErNkSsEeHtsSEthNeSEhi6gh
threshold associated with LBO/LBO.
2
GND
P2 GND GLrBoOuHnd5
2 GND LBOH 5
2 GND
LSENSE 5
3
LTHIN
I
3
LTH Threshold Monitor Input. A resistor-divider network sets the low
LTHINthrLeBsOhLold4 associated w3ithLLTHBINO/LLBBOOL. 4
3 RESET
VCC 4
Low-Battery Output. LBO /LBO is asserted when LTHIN drops below VLTHIN,
4
LBO/LBO
O and remains asserted for at least 90ms HTHIN rises above VHTHIN. Push-pull
output for PT7M7433. Open drain output for PT7M7434/35.
5
VCC
P Supply Voltage. Device power supply for adjustable threshold versions.
12-07-0002
PT0213-4
07/05/12
1




 PT7M7433
PT7M7433/34/35
P Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Block Diagram
PT7M7433/34/35Block Diagram
VCC
R1
LTHIN
R2
HTHIN
R3
VCC
EXTERNAL
RESISTOR-
DRIVER
615
mV
VCC
LBO TIMOUT
PERIOD
RQ
S
Q
LBO
(LBO)
LBO: PT7M7433/34
LBO: PT7M7435
Maximum Ratings
Storage Temperature ............................................................-65oC to +150oC
Ambient Temperature with Power Applied.......................... -40oC to +85oC
Supply Voltage to Ground Potential (Vcc to GND) ..............-0.3V to +7.0V
DC Input Voltage (All inputs except Vcc and GND)......-0.3V to VCC+0.3V
DC Output Current (All outputs) ..........................................................20mA
Power Dissipation .............................................................................. 320mW
(Depend on package)
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
12-07-0002
PT0213-4
07/05/12
2




 PT7M7433
PT7M7433/34/35
P Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
DC Electrical Characteristics
(VCC =1.8V to 5.5V, TA= -40~85ºC, unless otherwise noted. Typical values are at TA = +25ºC)
Description
Symbol
Test Conditions
Min
Operating Voltage Range
VCC Supply Current
Output High Voltage
(Push-Pull only)
Output Low Voltage
Open-Drain Output
Leakage Current
Input Leakage Current
VCC TA= -40~85ºC
ICC VCC = 3.7V, no load TA= -40~85ºC
VCC ≥ 1.6V, Isource = 200μA
VOH VCC ≥ 2.7V, Isource = 500μA
VCC ≥ 4.5V, Isource = 800μA
VCC ≥ 1.6V, Isink = 100μA
VOL VCC ≥ 2.7V, Isink = 1.2mA
VCC ≥ 4.5V, Isink = 3.2mA
ILKG
-
ILKG
VHTHIN or VLTHIN > 400mV
1.8
-
0.8×Vcc
0.8×Vcc
0.8×Vcc
-
-
-
-
-
User-adjustable Thresholds (PT7M7433/34/35)
HTHIN Threshold(Note)
VHTHIN
HTHIN rising, LBO is
deasserted when HTHIN
rises above 615mV.
TA= 25ºC
TA= -30~70ºC
-1.5
-2.5
LTHIN Threshold(Note)
VLTHIN
LTHIN falling, LBO is
TA= 25ºC
asserted when LTHIN falls
below 615mV.
TA= -30~70ºC
-1.5
-2.5
Note: Typical value is 615mV. Minimum and Maximum value is percentage of typical value.
Typ
-
1.5
-
-
-
-
-
-
-
-
-
-
-
-
Max
5.5
2.5
-
-
-
0.3
0.3
0.4
1
20
Unit
V
μA
V
V
μA
nA
+1.5 %
-2.5 %
+1.5 %
-2.5 %
AC Electrical Characteristics
Fig 1. PT7M7433/34/35 timing diagram
VCC
VHTH
VLTH
tLBOP
LBO
(PT7M7433/34)
tLBOP
LBO
(PT7M7435)
tLBOD
tLBOD
(VCC =1.8V to 5.5V, TA= -40~85ºC, unless otherwise noted. Typical values are at TA = +25ºC)
Symbol
Description
Test Conditions
Min
tLBOP
tLBOD
Timeout period
Delay
-
-
90
-
Typ
200
70
Max
Unit
350 ms
- s
12-07-0002
PT0213-4
07/05/12
3



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