AD ADM6306D131ARJZ1R7

Multiple Input Programmable
Supervisory ICs
ADM6305/ADM6306
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
VCC
RST IN1
RESET
GENERATOR
RESET
0.4V/1.23V
RST IN2
ADM6305
0.4V/1.23V
GND
09345-001
Adjustable input threshold voltage options: 0.4 V and 1.23 V
Pre-trimmed VCC threshold options (ADM6306)
Increments between 2.5 V and 5 V
Manual reset input (ADM6306)
4 factory programmed reset timeout delays
1 ms, 20 ms, 140 ms, and 1.12 sec (minimum)
Reset output stage: active low, open drain
Low power consumption: 5 µA typical
Power supply glitch immunity
5-lead SOT-23 package
Temperature range: −40°C to +125°C
Figure 1.
VCC
APPLICATIONS
Portable/battery-operated equipment
Microprocessor systems
Multivoltage applications
1.23V
RST IN
RESET
GENERATOR
RESET
0.4V/1.23V
VCC
GLITCH
REJECTION
GND
09345-002
ADM6306
MR
Figure 2.
GENERAL DESCRIPTION
The ADM6305/ADM6306 are dual voltage supervisors
designed to monitor two supplies and provide a reset signal to
DSP- and microprocessor-based systems. Low supply current
and a small form factor make these devices suitable for portable
and battery-operated applications.
If a monitored power supply voltage falls below the minimum
voltage threshold, a single active low output asserts triggering a
system reset. Once all voltages rise above the selected threshold
level, the reset signal remains low for the reset timeout period.
Four reset timeout options are available.
The ADM6305 monitors two supplies via two adjustable
resistor-programmable undervoltage reset inputs. Both RST
IN1 and RST IN2 have a reset threshold of either 0.4 V or
1.23 V depending on the particular model; that is, the RST IN1
and RST IN2 threshold of the ADM6305DxARJZ model is
1.23 V, while in the case of ADM6305DxARJZ1 model, it is
0.4 V. The VCC input of the ADM6305 is not a monitored input.
The ADM6306 has one adjustable undervoltage reset input,
RST IN, which features a choice of reset threshold, 0.4 V or
1.23 V (see the Ordering Guide for more information). The
ADM6306 incorporates a variety of internally pretrimmed VCC
undervoltage threshold options for monitoring supply voltages
in increments between 2.5 V and 5 V. The ADM6306 also
includes a manual reset input.
The ADM6305/ADM6306 RESET output remains valid as long
as VCC exceeds 0.9 V.
The ADM6305/ADM6306 are available in a 5-lead SOT-23
package. These devices are specified over the temperature range
of −40°C to +125°C.
Rev. 0
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Fax: 781.461.3113
©2010 Analog Devices, Inc. All rights reserved.
ADM6305/ADM6306
TABLE OF CONTENTS
Features .............................................................................................. 1
Pin Configurations and Function Descriptions ............................5
Applications ....................................................................................... 1
Typical Performance Characteristics ..............................................6
Functional Block Diagrams ............................................................. 1
Theory of Operation .........................................................................8
General Description ......................................................................... 1
Input Configuration ......................................................................8
Revision History ............................................................................... 2
Reset Output Configuration ........................................................8
Specifications..................................................................................... 3
Manual Reset..................................................................................8
Absolute Maximum Ratings ............................................................ 4
Options ...............................................................................................9
Thermal Resistance ...................................................................... 4
Outline Dimensions ....................................................................... 11
ESD Caution .................................................................................. 4
Ordering Guide .......................................................................... 11
REVISION HISTORY
10/10—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
ADM6305/ADM6306
SPECIFICATIONS
VCC = 2.5 V to 5 V for the ADM6305, VCC = (VTH + 2.5%) to 5.5 V for the ADM6306. TA = −40°C to +125°C, unless otherwise noted.
Typical values are at TA = 25°C.
Table 1.
Parameter
OPERATING VOLTAGE RANGE, VCC 1
Min
0.9
0.9
Typ
Max
5.5
VTH − 1%
VTH − 1.5%
VTH − 2.5%
5
5
VTH
VTH
VTH
25
2 × VTH
16
20
VTH + 1%
VTH + 1.5%
VTH + 2.5%
1.0
20
140
1120
1.4
28
200
1570
2.0
40
280
2240
0.4
0.3
0.3
0.3
0.3
ms
ms
ms
ms
V
V
V
V
V
0.8
0.3 × VCC
V
V
V
V
µs
µs
µs
ns
kΩ
VTH > 4.0 V
VTH < 4.0 V
VTH > 4.0 V
VTH < 4.0 V
TA = 0°C to +70°C
TA = −40°C to +125°C
V
TA = 25°C
TA = −40°C to +85°C
TA = −40°C to +125°C
0 V < VRST IN < VCC – 0.3 V3, TA = −40°C to +85°C
VRST IN = VRSTH
INPUT CURRENT, ICC
VCC THRESHOLD VOLTAGE (ADM6306)2
RESET THRESHOLD TEMPERATURE COEFFICIENT
RESET THRESHOLD HYSTERESIS (VHYST)
RESET TIMEOUT PERIOD (tRP)
ADM630xD1
ADM630xD2
ADM630xD3
ADM630xD4
RESET OUTPUT VOLTAGE (VOL)
MR INPUT (ADM6306)
VIL
VIH
MR Minimum Input Pulse Width
MR Glitch Rejection
MR To Reset Delay
MR Pull-Up Resistance
1.23 V ADJUSTABLE RESET COMPARATOR INPUT
RST INx Input Threshold, VRSTH
RST INx Input Current, IRST INx
RST INx Hysteresis
0.4 V ADJUSTABLE RESET COMPARTOR INPUT
RST INx Input Threshold, VRSTH
RST INx Input Current, IRST INx
2.4
0.7 × VCC
1
1.5
32
1.22
1.211
1.20
−25
−25
0.1
500
63.5
1.23
1.23
100
1.24
1.249
1.26
+25
+25
2.5
0.396
0.394
0.39
−25
−25
0.40
0.40
0.40
0.404
0.406
0.41
+25
+25
1
Unit
V
V
µA
µA
V
V
V
ppm/°C
mV
V
nA
nA
mV
V
V
V
nA
nA
Test Conditions/Comments
VCC that guarantees valid output
VCC = 5.5 V, TA = −40°C to +85°C
VCC = 5.5 V, TA = −40°C to +125°C
TA = 25°C
TA = −40°C to +85°C
TA = −40°C to +125°C
VCC > 4.25 V, ISINK = 3.2 mA
VCC > 2.5 V, ISINK = 1.2 mA
VCC > 1.2 V, ISINK = 500 μA
VCC > 1 V, ISINK = 50 μA
VCC > 0.9 V, ISINK = 25 μA
TA = 25°C
TA = −40°C to +85°C
TA = −40°C to +125°C
0 V < VRST INx < VCC – 0.3 V3, TA = −40°C to +85°C
VRST IN = VRSTH
The ADM6305 switches from undervoltage reset to normal operation when 1.5 V > VCC < 2.5 V.
The AMD6306 monitors VCC through an internal factory trimmed voltage divider, which programs the nominal reset threshold. Factory-trimmed reset thresholds are
available in approximately 100 mV increments from 2.5 V to 5 V.
3
Guaranteed by design.
2
Rev. 0 | Page 3 of 12
ADM6305/ADM6306
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 2.
Parameter
VCC
All Pins (Except VCC)
Input/Output Current
Rate of Rise, VCC
Storage Temperature Range
Operating Temperature Range
Lead Temperature (10 sec)
Junction Temperature
Rating
−0.3 V to +6 V
−0.3 V to (VCC + 0.3 V)
20 mA
100 V/µs
−65°C to +160°C
−40°C to +125°C
300°C
150°C
Table 3.
Package Type
5-Lead SOT-23
ESD CAUTION
Stresses above those listed under Absolute 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 conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Rev. 0 | Page 4 of 12
θJA
240
Unit
°C/W
ADM6305/ADM6306
RESET 1
5
VCC
3
RST IN2
ADM6305
GND 2
TOP VIEW
(Not to Scale)
RST IN1 3
09345-003
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Figure 3. ADM6305 Pin Configuration
Table 4. ADM6305 Pin Function Descriptions
Mnemonic
Description
1
2
3
RESET
GND
RST IN1
4
RST IN2
5
VCC
Active Low, Open-Drain RESET Output.
Ground.
Adjustable Reset Comparator Input. This pin asserts RESET if the input voltage is below threshold. Its high input
impedance allows the use of an external resistor divider to program the monitoring threshold. Connect this pin to
VCC if it is not used.
Adjustable Reset Comparator Input. This pin asserts RESET if the input voltage is below threshold. Its high input
impedance allows the use of anexternal resistor divider to program the monitoring threshold. Connect this pin to
VCC if it is not used.
Power Supply Input. VCC is not monitored on ADM6305.
RESET 1
5
VCC
3
RST IN
ADM6306
GND 2
MR 3
TOP VIEW
(Not to Scale)
09345-004
Pin No.
Figure 4. ADM6306 Pin Configuration
Table 5. ADM6306 Pin Function Descriptions
Pin No.
Mnemonic
Description
1
2
3
4
RESET
GND
MR
RST IN
5
VCC
Active Low, Open-Drain RESET Output.
Ground.
Manual Reset Input.
Adjustable Reset Comparator Input. This pin asserts RESET if the input voltage is below threshold. Its high input
impedance allows the use of an external resistor divider to program the monitoring threshold. Connect this pin to
VCC if it is not used.
Power Supply Input. VCC is not monitored on ADM6306.
Rev. 0 | Page 5 of 12
ADM6305/ADM6306
TYPICAL PERFORMANCE CHARACTERISTICS
6.0
90
80
1mV/1µs
PROPAGATION DELAY (µs)
SUPPLY CURRENT (µA)
5.5
VCC = 4.5V
5.0
VCC = 5.5V
4.5
VCC = 2.5V
4.0
VCC = 3.5V
70
60
10mV/1µs
50
40
30
20
3.5
–40
–20
0
20
40
60
80
100
120
125
TEMPERATURE (°C)
0
09345-005
3.0
–40
20
40
60
80
100
120
125
Figure 8. VCC Falling Propagation Delay vs. Temperature
1.10
10k
TRANSIENT DURATION (µs)
1.05
1.00
0.95
1k
100
TRANSIENT DURATION
(µs) VTH = 5V
TRANSIENT DURATION
(µs) VTH = 2.5V
10
0.85
–40
–20
0
20
40
60
80
100
120
125
TEMPERATURE (°C)
1
Figure 6. Reset Timeout vs. Temperature
0
400
800
1200
OVERDRIVE, VTH – VCC (mV)
09345-009
0.90
09345-006
Figure 9. Maximum Transient Duration vs. VCC Reset Threshold Overdrive
1.010
120
1.008
100
PROPAGATION DELAY (µs)
1.006
1.004
1.002
1.000
0.998
0.996
0.994
1mV/1µs
80
60
10mV/1µs
40
20
0.992
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Figure 7. Reset Threshold vs. Temperature
125
0
09345-007
0.990
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
100
120
125
09345-010
NORMALIZED RESET TIMEOUT
0
TEMPERATURE (°C)
Figure 5. Supply Current vs. Temperature
NORMALIZED RESET THRESHOLD (V/V)
–20
09345-008
10
Figure 10. RST IN(VTH = 1.23 V) Falling Propagation Delay vs. Temperature
Rev. 0 | Page 6 of 12
ADM6305/ADM6306
10k
10k
TRANSIENT DURATION
(µs) 5V
TRANSIENT DURATION
(µs) 3V
10
1
0
200
400
600
800
1000
1200
OVERDRIVE, VREF – VRST IN (mV)
Figure 11. Maximum Transient Duration vs. RST IN (VTH = 1.23 V) Threshold
Overdrive
10mV/1µs
40
20
40
60
80
TEMPERATURE (°C)
100
120
125
09345-012
RST INx PROPAGATION DELAY (µs)
60
20
200
300
Figure 13. Maximum Transient Duration vs. RST INx (VTH = 0.4 V) Threshold
Overdrive
80
0
100
OVERDRIVE, VREF – VRST IN (mV)
1mV/1µs
–20
10
0
100
–40
100
1
120
0
1k
09345-013
TRANSIENT DURATION (µs)
TRANSIENT DURATION
(µs) 5V
100
09345-011
TRANSIENT DURATION (µs)
TRANSIENT DURATION
(µs) 3V
1k
Figure 12. RST INx (VTH = 0.4 V) Falling Propagation Delay vs. Temperature
Rev. 0 | Page 7 of 12
ADM6305/ADM6306
THEORY OF OPERATION
The ADM6305/ADM6306 are compact, low power supervisory
circuits capable of monitoring two voltage rails. If a monitored
voltage drops below its associated threshold, the active low reset
output asserts low.
The ADM6305 monitors two supplies via two adjustable
resistor-programmable undervoltage reset inputs. Both RST
IN1 and RST IN2 have a reset threshold of either 0.4 V or
1.23 V depending on the particular model; that is, the RST
IN1 and RST IN2 threshold of the ADM6305DxARJZ model
is 1.23 V, while in the case of ADM6305DxARJZ1 model, it is
0.4 V. The VCC input of the ADM6305 is not a monitored input.
The ADM6306 has one adjustable undervoltage reset input,
RST IN, which features a choice of reset threshold, 0.4 V or
1.23 V (see the Ordering Guide for more information). The
ADM6306 incorporates a variety of internally pretrimmed VCC
undervoltage threshold options for monitoring supply voltages
in increments between 2.5 V to 5 V. The ADM6306 also
includes a manual reset input.
INPUT CONFIGURATION
The threshold voltage at an adjustable input is either 0.4 V or
1.23 V. To monitor a voltage greater than the typical adjustable
threshold, VRSTH, connect a resistor divider network to the
circuit as depicted in Figure 14, where
R1 + R2 
VTH = VRSTH 

 R2 
on this input. The ADM6305/ADM6306 are powered via VCC.
Figure 9 shows the maximum transient duration vs. VCC reset
threshold overdrive, for which reset pulses are not generated.
Figure 9 depicts the maximum pulse width that a negative going
VCC transient may typically have without causing RESET to be
asserted. As the amplitude of the transient increases, the
maximum allowable pulse width decreases. The addition of a
bypass capacitor on VCC provides additional transient immunity.
RESET OUTPUT CONFIGURATION
The ADM6305/ADM6306 are available in a choice of four
reset timeouts. Once the monitored supplies rise above their
associated threshold level, the RESET signal remains low for
the reset timeout period before deasserting. Subsequently, if
a monitored supply falls below its associated threshold, the
RESET output reasserts. The open-drain RESET output of the
ADM6305/ADM6306 remains valid as long as VCC exceeds 0.9 V.
The ADM6305 remains in UVLO when VCC is below 1.5 V. The
RESET output is controlled by RTS INx if VCC exceeds 2.5 V.
The open-drain RESET output allows the ADM6305 and
ADM6306 to interface easily with microprocessors and
devices with bidirectional reset pins. Connecting the supervisory devices RESET output directly to the microcontrollers
RESET pin with a single pull-up resistor allows either device
to issue a system reset (see Figure 15).
VIN
VCC
R1
R2
VRSTH
09345-014
RESET
The high input impedance (leakage of ±25 nA) of the adjustable
inputs minimizes the offset error caused by the leakage current
and external resistor divider. This allows the user to apply a divider
with large resistance to minimize the loss. The offset voltage
caused by the leakage current is calculated by R1 × ±25 nA.
There is no hysteresis associated with the 0.4 V adjustable
inputs; instead, a time-based glitch filter to prevent false
triggering is used. The glitch filter avoids the need to use a
portion of the operating supply range to provide hysteresis
MICROPROCESSOR
RESET
Figure 15. Interfacing to Microprocessors with Bidirectional RESET Output
Figure 14. Setting the Adjustable Monitor
The RST INx inputs are designed to ignore fast voltage
transients (see Figure 11 and Figure 12). Increase the noise
immunity by connecting a 0.1 µF bypass capacitor between
RST INx and ground. Note that adding capacitance to RST
INx slows the overall response time of the device.
RPULL-UP
09345-015
ADM6305/
ADM6306
MANUAL RESET
The ADM6306 features a manual reset input (MR) which, when
driven low, asserts the reset output. When MR transitions from
low to high, reset remains asserted for the duration of the reset
active timeout period before deasserting. The MR input has a
63.5 kΩ internal pull-up resistor so that the input is always
high when unconnected. An external push-button switch can
be connected between MR and ground so that the user can
generate a reset. Debounce circuitry is integrated on-chip for
this purpose. Noise immunity is provided on the MR input,
and fast, negative-going transients of up to 0.1 µs (typical) are
ignored. If required, a 0.1 μF capacitor between MR and ground
provides additional noise immunity.
Rev. 0 | Page 8 of 12
ADM6305/ADM6306
OPTIONS
Table 6. ADM6306 VCC Reset Voltage Threshold Options
Reset Threshold Number
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Min
2.463
2.591
2.66
2.758
2.886
2.955
3.034
3.152
3.251
3.349
3.448
3.546
3.645
3.743
3.842
3.94
4.039
4.137
4.236
4.314
4.433
4.561
4.63
4.728
4.827
4.925
TA = 25°C
Typ
2.5
2.63
2.7
2.8
2.93
3
3.08
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4
4.1
4.2
4.3
4.38
4.5
4.63
4.7
4.8
4.9
5.0
Max
2.538
2.669
2.741
2.842
2.974
3.045
3.126
3.248
3.35
3.451
3.553
3.654
3.756
3.857
3.959
4.06
4.162
4.263
4.365
4.446
4.568
4.699
4.771
4.872
4.974
5.075
Min
2.438
2.564
2.633
2.73
2.857
2.925
3.003
3.12
3.218
3.315
3.413
3.51
3.608
3.705
3.803
3.9
3.998
4.095
4.193
4.27
4.388
4.514
4.583
4.68
4.778
4.875
TA= −40°C to +125°C
Max
2.563
2.696
2.768
2.87
3
3.075
3.157
3.28
3.383
3.485
3.588
3.69
3.793
3.895
3.998
4.1
4.203
4.305
4.408
4.49
4.613
4.746
4.818
4.92
5.023
5.125
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Table 7. Reset Timeout Options
Reset Timeout Period Code
ADM630xD1
ADM630xD2
ADM630xD3
ADM630xD4
Min
1.0
20
140
1120
TA= −40°C to +125°C
Typ
Max
1.4
2.0
28
40
200
280
1570
2240
Unit
ms
ms
ms
ms
Table 8. Adjustable Input Threshold Options
Model
ADM6305_ _ _ _ _Z-RL7
ADM6305_ _ _ _ _Z1-RL7
ADM6306_ _ _ _ _ _ _Z-R7
ADM6306_ _ _ _ _ _ _Z1-R7
RST IN1
1.23 V
0.4 V
N/A
N/A
Rev. 0 | Page 9 of 12
Monitored Input Threshold
RST IN2
1.23 V
0.4 V
N/A
N/A
RST IN
N/A
N/A
1.23 V
0.4 V
ADM6305/ADM6306
ADM6305D_ARJZ_-RL7
TEMPERATURE RANGE
A: –40°C TO +125°C
RST IN1 & RST IN2 ADJUSTABLE THRESHOLD
1:0.4V & 0.4V
BLANK: 1.23V & 1.23V
PACKAGE DESIGNATOR
RJ = SOT-23
Z = LEAD-FREE
09345-016
PACKING MATERIAL
RL7 = 7” TAPE & REEL
(3000 PIECE QUANTITY)
RESET TIMEOUT PERIOD CODE (1 TO 4)
Figure 16. ADM6305 Ordering Code Structure
ADM6306D_ _ _ARJZ_R7
PACKING MATERIAL
R7 = 7” TAPE & REEL
(3000 PIECE QUANTITY)
RESET TIMEOUT (1 TO 4)
RESET THRESHOLD NUMBER
(SEE TABLE 6)
Z = LEAD-FREE
PACKAGE DESIGNATOR
RJ = SOT-23
09345-017
RST IN ADJUSTABLE THRESHOLD
1:0.4V
DASH: 1.23V
TEMPERATURE RANGE
A: –40°C TO +125°C
Figure 17. ADM6306 Ordering Code Structure
Table 9. Standard Models
Model
ADM6305D3ARJZ-RL7
ADM6305D3ARJZ1-RL7
ADM6306D131ARJZ-R7
ADM6306D131ARJZ1R7
ADM6306D331ARJZ-R7
RST IN1
1.23 V
0.4 V
N/A
N/A
N/A
Monitored Input Threshold
RST IN2
VCC Reset
1.23 V
N/A
0.4 V
N/A
N/A
3.08 V
N/A
3.08 V
N/A
3.08 V
Rev. 0 | Page 10 of 12
RST IN
N/A
N/A
1.23 V
0.4 V
1.23 V
Minimum Reset Timeout
140 ms
140 ms
1 ms
1 ms
140 ms
ADM6305/ADM6306
OUTLINE DIMENSIONS
3.00
2.90
2.80
1.70
1.60
1.50
5
1
4
2
3.00
2.80
2.60
3
0.95 BSC
1.90
BSC
1.45 MAX
0.95 MIN
0.15 MAX
0.05 MIN
0.50 MAX
0.35 MIN
0.20 MAX
0.08 MIN
10°
5°
0°
SEATING
PLANE
0.20
BSC
0.55
0.45
0.35
121608-A
1.30
1.15
0.90
COMPLIANT TO JEDEC STANDARDS MO-178-AA
Figure 18. 5-Lead Small Outline Transistor Package [SOT-23]
(RJ-5)
Dimensions shown in millimeters
ROUND SPROCKET HOLES
09345-019
PIN 1 MARKER
DIRECTION OF FEED
Figure 19. ADM6305/ADM6306 Reel Orientation
ORDERING GUIDE
Model1, 2, 3
ADM6305D3ARJZ-RL7
ADM6305D3ARJZ1-RL7
ADM6306D131ARJZ-R7
ADM6306D331ARJZ-R7
ADM6306D131ARJZ1R7
Temperature Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Ordering Quantity4
3,000
3,000
3,000
3,000
3,000
Package Description
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
1
Package Option
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
Branding
LG9
LG8
LGA
LG6
LGC
ADM6305 and ADM6306 follow the C2 Pin 1 orientation standard for tape and reel packaging (see Figure 19).
If ordering nonstandard models, complete the ordering code shown in Figure 16 and Figure 17 by inserting the reset threshold, reset timeout, and adjustable
threshold suffixes. Contact Sales for availability of nonstandard models, quoting ADM6305-NTSD or ADM6306-NTSD first, and then the complete ordering code.
3
Z = RoHS Compliant Part.
4
A minimum of 10,000 must be ordered for nonstandard models.
2
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ADM6305/ADM6306
NOTES
©2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D09345-0-10/10(0)
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