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TS12001 の電気的特性と機能

TS12001のメーカーはTouchstoneです、この部品の機能は「Nanopower Voltage Detector」です。


製品の詳細 ( Datasheet PDF )

部品番号 TS12001
部品説明 Nanopower Voltage Detector
メーカ Touchstone
ロゴ Touchstone ロゴ 




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TS12001 Datasheet, TS12001 PDF,ピン配置, 機能
TS12001
A 0.65V/1µA Nanopower Voltage Detector with Dual Outputs
FEATURES
Nanopower Voltage Detector in Single 4 mm2
Package
Ultra Low Total Supply Current: 1µA (max)
Supply Voltage Operation: 0.65V to 2.5V
Preset 0.78V UVLO Trip Threshold
Internal ±10mV Hysteresis
Resettable Latched Comparator
Complimentary and Open-drain Comparator
Outputs
Separate Comparator Output Supply Pin
APPLICATIONS
Power-Fail Indicator
Low-Battery Detection
Battery-Backup Detection
CPU, Microprocessor, and Logic Reset Controller
Battery-powered Systems
DESCRIPTION
The TS12001 voltage detector combines a 0.58V
reference and a comparator with resettable
comparator latch in a single package. The TS12001
operates from a single 0.65V to 2.5V power supply
and consumes less than 1µA total supply current.
Optimized for ultra-long life operation, the TS12001
expands Touchstone’s growing “NanoWatt Analog™”
high-performance analog integrated circuits portfolio.
The voltage detector exhibits a preset UVLO
threshold voltage of 0.78V (typ) or can be set to other
threshold voltages with two external resistors. The
comparator exhibits ±10mV of internal hysteresis for
clean, chatter-free output switching. The TS12001
also offers both push-pull and open-drain outputs.
When compared against similar products, the
TS12001 offers a factor-of-2 lower power
consumption and at least a 33% reduction in pcb
area.
The TS12001 is fully specified over the -40°C to
+85°C temperature range and is available in a low-
profile, 10-pin 2x2mm TDFN package with an
exposed back-side paddle.
TYPICAL APPLICATION CIRCUIT
A Nanopower 1.8V Core System Voltage Detector
The Touchstone Semiconductor logo and “NanoWatt Analog” are
registered trademarks of Touchstone Semiconductor, Incorporated.
Page 1
© 2012 Touchstone Semiconductor, Inc. All rights reserved.
Free Datasheet http://www.datasheet4u.com/

1 Page





TS12001 pdf, ピン配列
TS12001
ELECTRICAL CHARACTERISTICS
VIN = OVDD = 0.8V; VSS = 0V; VSET = VSS; VCOUTPP = HiZ; VCOUTOD = HiZ; TA = -40°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C. See note 1.
PARAMETER SYMBOL CONDITIONS
MIN TYP MAX UNITS
Supply Voltage
VIN
0.65 2.5 V
Supply Current
IIN REFOUT = open
TA = +25°C
-40°C TA 85°C
0.8
1
µA
UVLO Output
Driver Supply
Voltage
OVDD
0.65 2.5 V
Output Driver
Supply Current
IODD
0.1 µA
Preset UVLO
Trip Point
VIN falling until COUTPP switches LOW
VIN rising until COUTPP switches HIGH
725 761
743 781
797
818
mV
SET Trip Point
VSET falling until COUTPP switches LOW
VSET rising until COUTPP switches HIGH
TA = +25°C
-40°C ≤ TA ≤ 85°C
TA = +25°C
-40°C ≤ TA ≤ 85°C
540 567
534
560 587
550
595
604
615
620
SET Trip
Response Time
VSET rising
VSET falling
13
10
µs
Preset UVLO
Trip Hysteresis
±10 mV
SET Enable
Threshold
See Note 2
90 mV
SET Input
Leakage
ET Input
Low Voltage
ET Input
High Voltage
ET Input
Leakage
VSET = VSS; VSET = VIN
VIL
Comparator Latched Output
Enabled
VIH
Comparator Latched Output
Disabled
V ET = VSS; V ET = 5.5V
0.78V VIN 1.1V
1.1V < VIN 2.5V
0.78V VIN 1.1V
1.1V < VIN 2.5V
VIN -0.1
1
20 nA
0.1
0.2
V
V
100 nA
Reference
Output Voltage
VREF
TA = +25°C
-40°C ≤ TA ≤ 85°C
555 577
552
600
602
mV
Reference
Load
Regulation
IOUT = ±100nA
0.5 %
Output High
Voltage
VOH COUTPP; IOUT = -100μA
VIN 0.1
V
Output Low
Voltage
VOL COUTPP; IOUT = 100μA
VSS + 0.1
V
Output Low
Voltage
VOL COUTOD; IOUT = 100μA
VSS + 0.11
V
Output Short-
Sourcing; VCOUTPP = VSS
0.1 mA
Circuit
Current,
ISC Sinking; VCOUTPP = VIN
Sinking; VCOUTOD = VIN
0.5
1.4
mA
mA
Open Drain
Leakage
COUTOD; VCOUTOD = 5V
20 nA
Note 1: All devices are 100% production tested at TA = +25°C and are guaranteed by characterization for TA = TMIN to TMAX, as specified.
Note 2: A SET voltage above this threshold voltage enables the SET pin voltage to control the comparator output.
TS12001DS r1p0
Page 3
RTFDS
Free Datasheet http://www.datasheet4u.com/


3Pages


TS12001 電子部品, 半導体
TS12001
allows the output of the comparator to latch to a
HIGH state under certain conditions. If ET is set
HIGH, the COUTPP output will switch based on the
input to the comparator. When
ET is set LOW
and COUTPP is HIGH, COUTPP will remain HIGH
until ET goes LOW. When COUTPP is initially
LOW instead, COUTPP will latch HIGH until a LOW-
to-HIGH transition occurs on the COUTPP output. In
essence, the
ET pin offers a LOW-to-HIGH
detection. However,
ET must not be left open.
The open-drain output, COUTOD, is the inverter
version of the COUTPP output. Connect
ET to
VIN for normal operation or to VSS for ET enable.
If the SET pin is not used, it cannot be left
unconnected and should be tied to VSS.
Comparator
The TS12001 has an internal comparator that can
eliminate supply glitches that commonly occur when
output transitions occur. In addition, the input exhibits
±10mV of internal hysteresis in order to insure clean
output switching behavior. The outputs can swing to
APPLICATIONS INFORMATION
External Voltage Detector Design
Depending on the battery voltage used and the
voltage one wishes to detect, the TS12001 can be
designed accordingly. As shown in Figure 1, R1 and
R2 can be selected based on the desired voltage to
detect. Table 1. provides R1 and R2 resistor
combinations for detecting various VIN voltages.
VIN Threshold
Voltage(V)
R1(MΩ) R2(MΩ)
0.9 2.2 4.02
1.07 3.32 4.02
1.28 4.75 4.02
1.52 6.49 4.02
1.85 8.66 4.02
Table 1. Resistor Combinations for Several VIN
Threshold Voltages
The design equation for this circuit is shown
below. The SET pin voltage (VSET) that will
cause a HIGH-to-LOW transition on the output is
approximately 580mV. To design the circuit, R1
or R2 can be selected along with the desired
battery voltage to detect.
Page 6
within 100mV of the supply rails. The COUTPP
output can source and sink 0.1mA and 0.5mA of
current. The COUTD outputs can sink 1.4mA of
current with VCOUTOD = 0.78V
Internal Reference
The TS12001’s on-board 0.58V ±4.5% reference
voltage can source and sink 0.1µA and 0.1µA of
current and can drive a capacitive load less than
50pF and greater than 50nF with a maximum
capacitive load of 250nF. The higher the capacitive
load, the lower the noise on the reference voltage
and the longer the time needed for the reference
voltage to respond and become available on the
REFOUT pin. With a 250nF capacitive load, the
response time is approximately 20ms. While also
available as a separate pin as REFOUT, the
reference is tied internally to the inverting input of the
comparator.
Then, the second resistor value can be
evaluated using the voltage divider equation
below.
R1=
VN
x
R VSET
VSET
x
R
A Nanopower 1.8V Core System Voltage Detector
When power supply rails sag in any system, it is
important to alert the CPU. A CPU can be used to
detect when I/O or core system voltages sag below a
prescribed threshold as shown Figure 2. In this
circuit, a 1.8V core system voltage detector is
designed around the TS12001 providing a low battery
detect signal. R1 and R2 were selected to set a SET
voltage at 582mV so that when VCORE drops below
1.77V, the TS12001 output transitions to LOW. It is
recommended to use 1% resistors for optimal
accuracy. The circuit consumes approximately
0.75µA of current when VCORE = 1.8V.
PC Board Layout and Power-Supply Bypassing
While power-supply bypass capacitors are not
typically required, it is good engineering practice to
use 0.1uF bypass capacitors close to the device’s
power supply pins. When the power supply
impedance is high, the power supply leads are long,
or there is excessive noise on the power supply
traces. To reduce stray capacitance, it is also good
TS12001DS r1p0
RTFDS
Free Datasheet http://www.datasheet4u.com/

6 Page



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共有リンク

Link :


部品番号部品説明メーカ
TS12001

Nanopower Voltage Detector

Touchstone
Touchstone
TS12001

Battery Management Under-Voltage Load Switch

Semtech
Semtech


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