TS12001
A 0.65V/1µA Nanopower Voltage Detector with Dual Outputs
FEATURES
DESCRIPTION
Nanopower Voltage Detector in Single 4 mm
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
2
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.
APPLICATIONS
Power-Fail Indicator
Low-Battery Detection
Battery-Backup Detection
CPU, Microprocessor, and Logic Reset Controller
Battery-powered Systems
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.
TS12001
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
IN
to V
SS
) ...................................................+2.75V
Supply Voltage (OV
DD
to V
SS
) ................................................+2.75V
Input Voltage
SET………………...…………………...….V
SS
– 0.3V to V
IN
+ 0.3V
ET………………………………….…........V
SS
- 0.3V to +5.5V
Output Voltage
REFOUT……….…………………...…... V
SS
– 0.3V to V
IN
+ 0.3V
COUTPP……………..……….........… V
SS
- 0.3V to OV
DD
+ 0.3V
COUTOD……………………..…..………..… V
SS
- 0.3V to +5.5V
Output Current
COUTPP, COUTOD………...…………................................20mA
Short-Circuit Duration
(REFOUT, COUTPP, COUTOD)………...………...….Continuous
Continuous Power Dissipation (T
A
= +70°C)
10-Pin TDFN (Derate at 13.48mW/°C above +70°C) ......... 1078mW
Operating Temperature Range ................................ -40°C to +85°C
Junction Temperature……………………………………..……+150°C
Storage Temperature Range ................................. -65°C to +150°C
Lead Temperature (Soldering, 10s) ..................................... +300°C
Electrical and thermal 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 condition beyond those indicated in the operational sections
of the specifications is not implied. Exposure to any absolute maximum rating conditions for extended periods may affect device reliability and
lifetime.
PACKAGE/ORDERING INFORMATION
ORDER NUMBER
PART
CARRIER QUANTITY
MARKING
TS12001ITD1022TP
AAN
TS12001ITD1022T
Tape
& Reel
Tape
& Reel
-----
3000
Lead-free Program:
Touchstone Semiconductor supplies only lead-free packaging.
Consult Touchstone Semiconductor for products specified with wider operating temperature ranges.
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TS12001DS r1p0
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TS12001
ELECTRICAL CHARACTERISTICS
V
IN
= OV
DD
= 0.8V; V
SS
= 0V; V
SET
= V
SS
; V
COUTPP
= HiZ; V
COUTOD
= HiZ; T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C. See note 1.
PARAMETER
SYMBOL CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage
V
IN
0.65
2.5
V
T
A
= +25°C
0.8
Supply Current
I
IN
REFOUT = open
µA
-40°C ≤ T
A
≤ 85°C
1
UVLO Output
Driver Supply
OV
DD
0.65
2.5
V
Voltage
Output Driver
I
ODD
0.1
µA
Supply Current
V
IN
falling until COUTPP switches LOW
725
761
797
Preset UVLO
mV
Trip Point
V
IN
rising until COUTPP switches HIGH
743
781
818
T
A
= +25°C
540
567
595
V
SET
falling until COUTPP switches LOW
-40°C ≤ T
A
≤ 85°C
534
604
SET Trip Point
T
A
= +25°C
560
587
615
V
SET
rising until COUTPP switches HIGH
-40°C ≤ T
A
≤ 85°C
550
620
V
SET
rising
13
SET Trip
µs
Response Time
V
SET
falling
10
Preset UVLO
±10
mV
Trip Hysteresis
SET Enable
See Note 2
90
mV
Threshold
SET Input
V
SET
= V
SS
; V
SET
= V
IN
20
nA
Leakage
0.78V ≤ V
IN
≤ 1.1V
0.1
Comparator Latched Output
ET Input
V
IL
V
Enabled
Low Voltage
1.1V < V
IN
≤ 2.5V
0.2
0.78V ≤ V
IN
≤ 1.1V
V
IN
-0.1
Comparator Latched Output
ET Input
V
IH
V
Disabled
High Voltage
1.1V < V
IN
≤ 2.5V
1
ET Input
V
ET
= V
SS
; V
ET
= 5.5V
100
nA
Leakage
T
A
= +25°C
555
577
600
Reference
V
REF
mV
Output Voltage
-40°C ≤ T
A
≤ 85°C
552
602
Reference
Load
I
OUT
= ±100nA
0.5
%
Regulation
Output High
V
OH
COUTPP; I
OUT
= -100μA
V
IN
– 0.1
V
Voltage
Output Low
V
OL
COUTPP; I
OUT
= 100μA
V
SS
+ 0.1
V
Voltage
Output Low
V
OL
COUTOD; I
OUT
= 100μA
V
SS
+ 0.11
V
Voltage
Sourcing; V
COUTPP
= V
SS
0.1
mA
Output Short-
Circuit
I
SC
Sinking; V
COUTPP
= V
IN
0.5
mA
Current,
Sinking; V
COUTOD
= V
IN
1.4
mA
Open Drain
COUTOD; V
COUTOD
= 5V
20
nA
Leakage
Note 1:
All devices are 100% production tested at T
A
= +25°C and are guaranteed by characterization for T
A
= T
MIN
to T
MAX
, as specified.
Note 2:
A SET voltage above this threshold voltage enables the SET pin voltage to control the comparator output.
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TS12001
PIN FUNCTIONS
PIN
1
NAME
VIN
FUNCTION
Positive Supply Voltage. Connect a 0.1µF bypass capacitor from
this pin to analog VSS/GND.
External UVLO Trip Threshold Set Pin. When this pin is set to
VSS, the internal preset 0.78V UVLO trip threshold controls the
comparator output. When the applied voltage to this pin is higher
than 90mV, the SET pin sets the trip threshold and controls the
comparator output. If the SET pin is not used, connect the pin to
to VSS.
No Connection
Negative Supply Voltage.
Latch Enable Pin. When
ET is set HIGH, the outputs of the
comparator will toggle normally based on the inputs to the
comparator. When
ET is set LOW and COUTPP is HIGH,
COUTPP will remain HIGH despite any changes to the input of
the comparator. COUTPP will once again respond to changes to
the input when
ET is toggled HIGH. If COUTPP is initially
LOW and the
ET is then LOW, COUTPP will stay LOW. If a
LOW-to-HIGH transition occurs on COUTPP, COUTPP will
switch to HIGH and stay HIGH and not respond to any changes
at the input. The
ET pin must always be set to a known state.
For unlatched comparator operation, set
ET to HIGH. The
open-drain output (COUTOD) is the inverted version of the
COUTPP output.
0.58V Reference Output
No Connection
Comparator Open-Drain Output
Comparator Push-Pull Output
Output Driver Positive Supply Voltage. Connect a 0.1µF bypass
capacitor from this pin to analog VSS/GND.
Exposed paddle is electrically connected to VSS/GND.
2
SET
3
4
NC
VSS
5
ET
6
7
8
9
10
EP
REFOUT
NC
COUTOD
COUTPP
OVDD
----
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TS12001DS r1p0
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TS12001
BLOCK DIAGRAM
THEORY OF OPERATION
The TS12001 combines a 0.58V ±4.5% reference
and an analog comparator with a 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.
The TS12001 comparator has a push-pull and open-
drain output driver. The push-pull output driver is
powered from a separate supply voltage, OV
DD
. The
open-drain output stage allows for easy output
voltage level translation as may be required when
driving systems powered with a different power
supply rail. The analog comparator exhibits ±10mV of
internal hysteresis for clean, chatter-free output
switching. The internal reference was designed to
sink or source up to 0.1µA load currents.
The TS12001 has a preset UVLO threshold voltage
of 0.78V (typ) or can be set to other threshold
voltages with two external resistors where the divided
voltage is applied to the SET pin. When the SET pin
voltage is grounded or it is less than approximately
90mV, the internal preset UVLO threshold circuit will
control the comparator outputs. If the SET pin is
above approximately 90mV, the external voltage
divider circuit will control the comparator outputs. The
0.58V reference voltage is tied to the inverting input
of the comparator and the output of a switch is
connected to the non-inverting input of the
comparator. The output of the switch is either the
SET voltage or the internal UVLO threshold voltage,
depending on whether the SET pin voltage is above
or below approximately 90mV. If the switch output is
above 0.58V, the push-pull output (COUTPP) will be
HIGH and the open-drain output (COUTOD) will be
LOW and vice versa. For proper operation, the
supply voltage V
IN
must be applied before the output
driver supply voltage (OV
DD)
is applied.
The TS12001 has a latch enable pin (
ET) that
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