RICHTEK RT9816

RT9816
Micro-Power Voltage Detectors with Manual Reset
General Description
Features
The RT9816 is a micro-power voltage detector with
deglitched manual reset input supervising the power
supply voltage level for microprocessors (μP) or digital
systems. It provides internally fixed threshold levels with
0.1V per step ranging from 1.0V to 5V, which covers most
digital applications. It features low supply current of 3μA.
The RT9816 performs supervisory function by sending
out a reset signal whenever the VDD voltage falls below a
z
preset threshold level. This reset signal will last the whole
period before VDD recovering. Once VDD recovered
upcrossing the threshold level, the reset signal will be
released after a certain delay time. To pull reset signal
low manually, just pull the manual reset input (MR) below
the specified VIL level. RT9816 is provided in SC-82
package.
z
Ordering Information
RT9816
-
z
z
z
z
z
z
z
z
z
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commercial Standard)
Threshold Voltage
12 : 1.2V
13 : 1.3V
:
49 : 4.9V
50 : 5.0V
Reset Active Timeout Period
A = 0ms (RESET)
B = 55ms (RESET)
C = 220ms (RESET)
D = 450ms (RESET)
E = 0ms (RESET)
F = 55ms (RESET)
G = 220ms (RESET)
H = 450ms (RESET)
Note :
RichTek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
No External Components Required
μs
Quick Reset within 20μ
Built-in Recovery Delay Include 0ms, 55ms, 220ms,
450ms Options
800ns Glitch Immunity of Manual Reset Input
Low Functional Supply Voltage 0.9V
N-Channel Open-Drain Output,
Small SC-82 Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
z
z
z
z
Package Type
Y : SC-82
Internally Fixed Threshold 1.0V to 5V in 0.1V Step
High Accuracy ±1.5%
Low Supply Current 3μ
μA
z
Computers
Controllers
Intelligent Instruments
Critical μP and μC Power Monitoring
Portable/Battery-Powered Equipment
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
Pin Configurations
(TOP VIEW)
VDD
MR
4
3
1
2
GND
RESET/
RESET
SC-82
Note : There is no pin1 indicator on top mark for SC-82 type,
and pin 1 will be lower left pin when reading top mark from
left to right. Pin2 of SC-82 is wider than other pins.
ments of IPC/JEDEC J-STD-020.
`Suitable for use in SnPb or Pb-free soldering processes.
`100%matte tin (Sn) plating.
DS9816-03 March 2007
www.richtek.com
1
RT9816
Typical Application Circuit
100k
Pull Up
VDD
up
RT9816
GND
RESET/
RESET
RESET/
RESET
VDD
MR
Functional Pin Description
Pin Name
Pin Function
GND
Ground Pin
RESET
Active Low Open-Drain Reset Output
RESET
Active High Open-Drain Reset Output
MR
Manual Reset
VDD
Power Pin
Function Block Diagram
MR
VDD
RESET/
RESET
VSET
CMP
Timer
N MOS
GND
Threshold
Voltage Setting
POR
Power On Reset
www.richtek.com
2
DS9816-03 March 2007
RT9816
Absolute Maximum Ratings
z
z
z
z
z
z
z
z
(Note 1)
Terminal Voltage (with Respect to GND)
VDD ------------------------------------------------------------------------------------------------------------------------ −0.3V to 6.0V
All Other Inputs -------------------------------------------------------------------------------------------------------- −0.3V to VDD+0.3V
Input Current, IVDD ----------------------------------------------------------------------------------------------------- 20mA
Power Dissipation, PD @ TA = 25°C
SC-82 -------------------------------------------------------------------------------------------------------------------- 0.25W
Package Thermal Resistance (Note 4)
SC-82, θJA --------------------------------------------------------------------------------------------------------------- 400°C
Lead Temperature (Soldering, 10sec.) ---------------------------------------------------------------------------- 260°C
Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 125°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
z
z
(Note 3)
Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ---------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VDD = 3V, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
0.9
--
6
V
Operating V DD (VOUT) Range
V DD
Supply Current
IDD
V TH = 3V , VDD = 4.5V TA = 27°C
--
3
8
μA
Reset Threshold
V TH
TA = 27°C
--
1.2 to 5.0
--
V
V IL
TA = 27°C, V TH > 1.2V
--
--
0.25V DD
V IH
TA = 27°C, V TH > 1.2V
0.7V DD
--
--
--
800
--
ns
−1.5
--
+1.5
%
--
20
--
μs
--
0
--
ms
35
55
75
ms
143
220
297
ms
292
450
608
ms
--
--
0.4
V
--
0.01VT H
--
V
MR Input Threshold
MR Glitch Rejection
Threshold Voltage Accuracy
ΔV TH
TA = 27°C
V DD Drop to Reset Delay
tRD
Drop = V TH -125mV
RT9816A/E
Reset Active
Time Out Period
RT9816B/F
RT9816C/G
tRP
VDD ≥ 1.02×VTH
RT9816D/H
RESET Output Voltage Low
V OL
Hysteresis Width
VHYS
DS9816-03 March 2007
3 = V DD < VTH IS INK >3.5mA
V
www.richtek.com
3
RT9816
Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for
stress ratings. 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 remain possibility to affect device reliability.
Note 2. Devices are ESD sensitive. Handling precaution recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. θJA is measured in the natural convection at T A = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
www.richtek.com
4
DS9816-03 March 2007
RT9816
Typical Operating Characteristics
Nch Driver Output Current vs. VDS
Nch Driver Output Current vs. VDS
60
RT9816A-12
VDD = 1.1V
2
1.6
1.2
VDD = 1.0V
0.8
RT9816C-30
VDD = 2.8V
50
Output Current (mA)
Output Current (mA)
2.4
0.4
VDD = 2.5V
40
30
VDD = 2.0V
20
VDD = 1.5V
10
0
0
0
0.3
0.6
0.9
1.2
1.5
0
0.5
1
1.5
7
3.5
RT9816
RT9816A-45
6
Output Volgate (V)
100
Output Current (mA)
3
Output Voltage vs. Input Voltage
Nch Driver Output Current vs. VDS
80
60
VDD = 4.4V
= 4.0V
= 3.5V
= 3.0V
= 2.5V
= 2.0V
= 1.5V
40
20
5
4
3
4.5V
2
1
0
1.2V
0
0
1
2
3
4
5
0
1
VDS (V)
2
3
4
5
6
Input Volgate (V)
Supply Current vs. Input Voltage
6
Supply Current vs. Input Voltage
4
RT9816A-12
RT9816C-30
3.5
5
80°C
Supply Current (uA)
Supply Current (uA)
2.5
VDS (V)
VDS (V)
120
2
4
25°C
3
2
-30°C
1
80°C
3
2.5
25°C
2
-30°C
1.5
1
0.5
0
0
0
1
2
3
4
Input Voltage (V)
DS9816-03 March 2007
5
6
0
1
2
3
4
5
6
Input Voltage (V)
www.richtek.com
5
RT9816
Power-Down Reset Delay vs. Temperature
Supply Current vs. Input Voltage
4
14
Power-Down Reset Delay (us)
RT9816A-45
3.5
Supply Current (uA)
80°C
3
25°C
2.5
-30°C
2
1.5
1
0.5
0
RT9816A-12
12
10
VDROP = 200mV
8
VDROP = 150mV
6
VDROP = 250mV
4
2
0
0
1
2
3
4
5
6
-50
-25
0
Input Voltage (V)
Power-Down Reset Delay (us)
Power-Down Reset Delay (us)
RT9816C-30
35
30
VDROP = 200mV
20
VDROP = 150mV
15
VDROP = 250mV
10
5
0
125
RT9816A-45
40
35
30
25
VDROP = 200mV
VDROP = 150mV
20
15
VDROP = 250mV
10
5
-25
0
25
50
75
100
125
-50
-25
0
Temperature (°C)
50
75
100
125
Nch Driver Sink Current vs. Input Voltage
40
RT9816
5.0V
RT9816C-30, VDS = 0.5V
35
Sink Current ISINK (mA)
5
4.5V
4
25
Temperature (°C)
Reset Threshold Deviation vs. Temperature
Reset Threshold (V)
100
0
-50
6
75
Power-Down Reset Delay vs. Temperature
45
40
25
50
Temperature (°C)
Power-Down Reset Delay vs. Temperature
45
25
4.2V
3
2.2V
2
-30°C
30
25°C
25
20
80°C
15
10
5
1.2V
0
1
-50
-25
0
25
50
75
Temperature (°C)
www.richtek.com
6
100
125
0
0.5
1
1.5
2
2.5
3
3.5
Input Voltage(V)
DS9816-03 March 2007
RT9816
Power-Up Reset Time-Out vs. Temperature
Nch Driver Sink Current vs. Input Voltage
50
500
-30°C
Sink Current ISINK (mA)
RT9816C
Power-Up Reset Time-Out (ms)
RT9816A-45, VDS = 0.5V
40
25°C
30
80°C
20
10
400
VTH = 2.9V
300
VTH = 3.0V
200
100
0
0
0
1
2
3
4
5
-50
-25
0
25
Input Voltage(V)
100
125
Output Delay Time vs. Load Capacitance
Power-Up Reset Time-Out vs. Temperature
1000
RT9816A
Output Delay Time (ms)
Power-Up Reset Time-Out (us)
75
Temperature (°C)
100
80
60
VTH = 5.0V
40
VTH = 4.5V
20
100
10
VTH = 1.2V
1
0.1
VTH = 4.5V
0
-50
-25
0
25
50
75
100
125
0.01
0.0001
0.0010
60
Nch Driver Output Current (mA)1
RT9816G-31
140
120
100
VDD = 6.0V
= 5.5V
= 5.0V
= 4.5V
= 4.0V
= 3.5V
80
60
40
0.1000
1.0000
Nch Driver Output Current vs. Input Voltage
Nch Driver Output Current vs. VDS
160
0.0100
Load Capacitance (uF)
Temperature (°C)
Nch Driver Output Current (mA)1
50
20
RT9816G-31
VDS = 0.5V
-30°C
50
25°C
40
80°C
30
20
10
0
0
0
1
2
3
VDS (V)
DS9816-03 March 2007
4
5
6
0
1
2
3
4
5
6
Input Voltage (V)
www.richtek.com
7
RT9816
Output Voltage vs. Input Voltage
7
RT9816G-31
RT9816G-31
6
400
Output Voltage (V)
Power Down Reset Time-Out (ms)
Power Down Reset Time-Out vs. Temperature
500
300
200
5
4
3
2
100
1
0
0
-50
-25
0
25
50
75
100
125
Temperature (°C)
0
1
2
3
4
5
6
Input Voltage (V)
Power-Down Reset Time-Out (us)
Power-Down Reset Time-Out vs. Temperature
30
RT9816G-31
25
20
VDROP = 200mV
VDROP = 150mV
15
10
VDROP = 250mV
5
0
-50
-25
0
25
50
75
100
125
Temperature (°C)
www.richtek.com
8
DS9816-03 March 2007
RT9816
Application Information
Multiple Supplies
Mainly, the pull-up connected to the RT9816 will connect to the supply voltage that is being monitored at the IC’ s VCC
pin. However, some systems may use the open-drain output to level-shift from the monitored supply to reset circuitry
powered by some other supply.
Benefits of Highly Accurate Reset Threshold
Most μP supervisor ICs have reset threshold voltages between 1% and 1.5% below the value of nominal supply voltages.
This ensures a reset will not occur within 1% of the nominal supply, but will occur when the supply is 1.5% below
nominal.
DS9816-03 March 2007
www.richtek.com
9
RT9816
Outline Dimension
D
e
H
L
B
C
b1
b
A
A1
e
Symbol
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
0.800
1.100
0.031
0.043
A1
0.000
0.100
0.000
0.004
B
1.150
1.350
0.045
0.053
b
0.150
0.400
0.006
0.016
b1
0.350
0.500
0.014
0.020
C
1.800
2.450
0.071
0.096
D
1.800
2.200
0.071
0.087
e
1.300
0.051
H
0.080
0.260
0.003
0.010
L
0.200
0.460
0.008
0.018
SC-82 Surface Mount Package
Richtek Technology Corporation
Richtek Technology Corporation
Headquarter
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
8F, No. 137, Lane 235, Paochiao Road, Hsintien City
Hsinchu, Taiwan, R.O.C.
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)89191466 Fax: (8862)89191465
Email: [email protected]
www.richtek.com
10
DS9816-03 March 2007