MIC2786-YFYMT [MICREL]
Push-Button Reset IC with Voltage Supervisor; 按钮复位IC与电压监控器型号: | MIC2786-YFYMT |
厂家: | MICREL SEMICONDUCTOR |
描述: | Push-Button Reset IC with Voltage Supervisor |
文件: | 总17页 (文件大小:579K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
MIC2786/MIC2787
Push-Button Reset IC with Voltage
Supervisor
General Description
Features
The MIC2786/MIC2787 are low-current, ultra-small, push-
button supervisor reset ICs with an integrated supply
voltage monitor. The device features two manual reset
inputs and two reset outputs. The reset outputs are
asserted and held when the supply voltage decreases
below the factory programmed threshold voltage. Reset
will be asserted for the reset timeout delay once the supply
voltage increases above the rising threshold voltage or
when both manual reset inputs are asserted low for longer
than the setup delay time.
• 1.6V to 5.5V operating voltage
• 7.4µA supply current when /MR0, /MR1 not asserted
• 1.66V to 4.63V preset voltage threshold options
• 2.5% voltage threshold accuracy over temperature
• Asserting /MR0 and /MR1 for the setup delay time
asserts reset output for the reset timeout delay
• Programmable delay (PDY) input selects 2s, 4s or 6s
setup delay
• Factory-programmed 140ms (min.) or 240ms (min.)
The MIC2786 features integrated pull-up resistors on the
/MR0 and /MR1 inputs, while the MIC2787 requires
external pull-up resistors. The PDY input pin selects
between a 2s, 4s or 6s setup period. Factory-programmed
reset timeout delays of 140ms (min.) and 240ms (min.) are
available. An active-low, open-drain reset output (/RST)
and an active-high, push-pull reset output (RSTP) provide
flexibility when interfacing to various microcontrollers,
PMICs, or load switches.
reset timeout delay
• Integrated /MR0, /MR1 pull-up resistors (MIC2786)
• Dual reset outputs:
− Open-drain, active-low reset output (/RST)
− Push-pull, active-high reset output (RSTP)
• −40°C to +85°C ambient operating temperature range
• 8-pin 2mm x 2mm x 0.55mm Thin MLF® package
The MIC2786/MIC2787 consume a quiescent current of
only 7.4µA and are offered in a tiny, space saving 8-pin
Thin MLF® (2mm x 2mm x 0.55mm) package.
Applications
• Smart phones
• Tablets
• Set-top boxes (STB)
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
_________________________________________________________________________________________________________________________
Typical Application
MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-102711-A
October 2011
Micrel, Inc.
MIC2786/87
Ordering Information (1)
Nominal
Threshold
Voltage
Integrated Pull-Up
Resistors
Part Number
Marking Minimum tRESET (ms)
Package (3,4)
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
8-Pin (2mm × 2mm) Thin MLF®
MIC2786-XAYMT
MIC2786-YAYMT(2)
MIC2786-XBYMT(2)
MIC2786- YBYMT(2)
MIC2786- XCYMT(2)
MIC2786-YCYMT(2)
MIC2786-XDYMT(2)
MIC2786-YDYMT(2)
MIC2786-XEYMT(2)
MIC2786-YEYMT(2)
MIC2786-XFYMT(2)
MIC2786-YFYMT(2)
MIC2786-XGYMT(2)
MIC2786-YGYMT(2)
MIC2786-XHYMT(2)
MIC2786-YHYMT(2)
MIC2787-XAYMT(2)
MIC2787-YAYMT(2)
MIC2787-XBYMT(2)
MIC2787-YBYMT(2)
MIC2787-XCYMT(2)
MIC2787-YCYMT(2)
MIC2787-XDYMT
MIC2787-YDYMT(2)
MIC2787-XEYMT(2)
MIC2787-YEYMT(2)
MIC2787-XFYMT(2)
MIC2787-YFYMT(2)
MIC2787-XGYMT(2)
MIC2787-YGYMT(2)
MIC2787-XHYMT(2)
MIC2787-YHYMT(2)
Notes:
6XA
6YA
6XB
6YB
6XC
6YC
6XD
6YD
6XE
6YE
6XF
6YF
6XG
6YG
6XH
6YH
7XA
7YA
7XB
7YB
7XC
7YC
7XD
7YD
7XE
7YE
7XF
7YF
7XG
7YG
7XH
7YH
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
4.625
4.625
4.375
4.375
3.075
3.075
2.925
2.925
2.625
2.625
2.313
2.313
2.188
2.188
1.665
1.665
4.625
4.625
4.375
4.375
3.075
3.075
2.925
2.925
2.625
2.625
2.313
2.313
2.188
2.188
1.665
1.665
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
1. All devices available in Tape and Reel only.
2. Contact Factory for availability.
3. Thin MLF ® ▲ = Pin 1 identifier.
4. Thin MLF ® is a Green RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
M9999-102711-A
October 2011
2
Micrel, Inc.
MIC2786/MIC2787
Pin Configuration
MIC2786/MIC2787
8-Pin (2mm × 2mm) Thin MLF®
Top View
Pin Description
Pin Number
Pin Name Pin Function
Active-High Push-Pull Reset Output. This output changes from low-to-high when VIN drops below the
selected reset threshold or both manual reset pins are pulled low for the setup delay period. RSTP
remains high for the reset timeout delay after VIN exceeds the reset threshold plus hysteresis voltage
or the setup delay period has elapsed.
1
2
3
RSTP
GND
/MR1
Supply Ground.
Active-Low Manual Reset Input. The MIC2786 has an internal 65kΩ pull-up resistor to VIN, while the
MIC2787 requires an external pull-up resistor to VIN if used with a push button. Pull this pin low to
assert and force a reset. Pulling both manual reset inputs low for the setup delay time causes one
reset output pulse for the reset timeout delay period. Connect to VIN if unused, do not leave floating.
Active-Low Open-Drain Reset Output. This output changes from high-to-low when VIN drops below
the selected reset threshold or both manual reset pins are pulled low for the setup delay period. /RST
remains low for the reset timeout delay after VIN exceeds the reset threshold or the setup delay has
elapsed and it requires an external pull-up resistor.
4
/RST
Programmable Delay Input with Tri-State Connection. When left open, setup delay is 2s, when
connected to GND, setup delay is 4s and when connected to VIN, setup delay is 6s.
5
6
PDY
NC
No Connect. Leave pin floating.
Active Low Manual Reset Input. The MIC2786 has an internal 65kΩ pull-up resistor to VIN, while the
MIC2787 requires an external pull-up resistor to VIN if used with a push button. Pull this pin low to
assert and force a reset. Pulling both manual reset inputs low for the setup delay time causes one
reset output pulse for the reset timeout delay period. If unused, connect to VIN; do not leave floating.
7
/MR0
Supply Voltage Pin. It is the input to the Supply Voltage monitor. When the supply voltage falls below
the reset threshold voltage, reset outputs (/RST and RSTP) are triggered immediately. When the
supply voltage rises above the reset threshold plus hysteresis voltage, the reset outputs remain
asserted for the duration of the reset timeout delay. A minimum 0.1μF decoupling ceramic capacitor
must be connected between VIN and GND close to the pins.
8
VIN
EPAD
EPAD
Exposed Pad. Connect to GND.
M9999-102711-A
October 2011
3
Micrel, Inc.
MIC2786/MIC2787
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)..................................... +1.6V to +5.5V
Reset Input Voltage (/MR0, /MR1)......................... 0V to VIN
Open Drain Reset Output (/RST)...................... 0V to +5.5V
Push-Pull Reset Output (RSTP) ............................ 0V to VIN
Tri-State Programmable Delay (PDY).................... 0V to VIN
Ambient Temperature (TA) ..........................−40°C to +85°C
Junction Thermal Resistance
Supply Voltage (VIN)..................................... −0.3V to +6.0V
Reset Input Voltage (/MR0, /MR1).......... −0.3V to VIN+0.3V
Open Drain Reset Output (/RST)................. −0.3V to +6.0V
Push-Pull Reset Output (RSTP).............. −0.3V to VIN+0.3V
Tri-State Programmable Delay (PDY)..... −0.3V to VIN+0.3V
Lead Temperature (soldering, 10s)............................ 260°C
Junction Temperature (TJ) ........................−40°C to +150°C
Storage Temperature (Ts).........................−55°C to +150°C
ESD Rating (Human Body Model) (3)..............................2kV
ESD Rating (Machine Model) (3) ...................................300V
2mm × 2mm Thin MLF® (θJA).............................90°C/W
Electrical Characteristics(4)
VIN = 3.0V, TA = 25°C, Bold values indicate −40°C ≤ TA ≤ +85°C; unless noted otherwise.
Parameter
Conditions
Min.
1.6
Typ.
Max.
Units
Power Supply Input
Supply Voltage (VIN)
5.5
V
VIN = 5V; /MR0, /MR1, /RST, RSTP, and PDY
open
7.9
7.4
12.5
Supply Current (IVIN
)
µA
VIN = 3V; /MR0, /MR1, /RST, RSTP, and PDY
open
Reset Threshold Voltage
4.533
4.509
4.288
4.266
4.625
4.625
4.375
4.375
4.718
4.741
4.463
4.484
A (falling) TA = 25°C
A (falling) −40°C ≤ TA ≤ +85°C
B (falling) TA = 25°C
B (falling) –40°C ≤ TA ≤ +85°C
C (falling) TA = 25°C
3.014
2.998
2.867
2.852
2.573
2.559
2.267
2.255
2.144
2.133
1.632
1.623
3.075
3.075
2.925
2.925
2.625
2.625
2.313
2.313
2.188
2.188
1.665
1.665
3.137
3.152
2.984
2.998
2.678
2.691
2.359
2.371
2.232
2.243
1.698
1.707
C (falling) –40°C ≤ TA ≤ +85°C
D (falling) TA = 25°C
Reset Threshold Voltage (VTH
)
D (falling) –40°C ≤ TA ≤ +85°C
E (falling) TA = 25°C
V
E (falling) –40°C ≤ TA ≤ +85°C
F (falling) TA = 25°C
F (falling) –40°C ≤ TA ≤ +85°C
G (falling) TA = 25°C
G (falling) –40°C ≤ TA ≤ +85°C
H (falling) TA = 25°C
H (falling) –40°C ≤ TA ≤ +85°C
M9999-102711-A
October 2011
4
Micrel, Inc.
MIC2786/MIC2787
Electrical Characteristics (4) (Continued)
VIN = 3.0V, TA = 25°C, Bold values indicate −40°C ≤ TA ≤ +85°C; unless noted otherwise.
Parameter
Conditions
A, B
Min.
Typ.
0.5
Max.
Units
%
Hysteresis Voltage (VHYST
Hysteresis Voltage (VHYST
Reset Time
)
)
C, D, E, F, G, H
1.0
%
PDY = Open
PDY = 0V
PDY = VIN
Option X
1.6
3.2
4.8
140
240
2.0
4.0
6.0
220
350
2.4
4.8
7.2
280
480
s
s
Setup Delay (tSETUP
)
s
ms
ms
Reset Timeout Delay (tRESET
)
Option Y
Reset Outputs (/RST, RSTP)
0.3
0.3
0.3
VIN = 4.5V, ISINK = 3.2mA
VIN = 3.3V, ISINK = 2.5mA
VIN = 1.6V, ISINK = 1.0mA
VIN = 4.5V, ISOURCE = 0.8mA
VIN = 2.7V, ISOURCE = 0.5mA
VIN = 1.6V, ISOURCE = 250μA
V/RST = 5.5V
Reset Output Voltage Low
(/RST Output and RSTP Output) (VOL
V
)
0.8 × VIN
0.8 × VIN
0.8 × VIN
Reset Output Voltage High
V
(RSTP Output) (VOH
)
/RST Output Leakage (ILO
)
0.3
μA
Manual Reset Inputs (/MR0, /MR1)
Input High Voltage (VIH)
1.2
V
V
Input Low Voltage (VIL)
0.3
1.0
Internal Pull-Up Resistor (RPU
Leakage Current /MR0, /MR1 Pin (IMR
Programmable Setup Delay Input (PDY)
)
MIC2786 only
65
kΩ
μA
)
/MR0, /MR1 inputs; MIC2787 only
−1.0
PDY = VIN, /MR0 = /MR1 = 0V
PDY = VIN, /MR0 = VIN or /MR1= VIN
PDY = 0V, /MR0 = /MR1 = 0V
+60
100
-60
μA
nA
μA
nA
Input Bias Current PDY Pin (IPDY
)
PDY = 0V, /MR0 = VIN or /MR1 = VIN
100
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
M9999-102711-A
October 2011
5
Micrel, Inc.
MIC2786/MIC2787
Typical Characteristics
Setup Delay
vs. Temperature (PDY = OPEN)
Reset Timeout Delay (Option X )
vs. Temperature (PDY = OPEN)
VIN Supply Current
vs. Temperature (PDY = OPEN)
9.0
3.0
2.5
2.0
1.5
1.0
250
240
230
220
210
200
VIN = 3.0V
VIN = 3.0V
VIN = 3.0V
PDY = OPEN
PDY = OPEN
PDY = OPEN
8.2
7.4
6.6
5.8
5.0
-40
-40
-40
-15
10
35
60
85
85
85
-40
-15
10
35
60
85
85
85
-40
-15
10
35
60
85
85
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
Setup Delay
Reset Timeout Delay (Option X )
vs. Temperature (PDY = 0V)
VIN Supply Current
vs. Temperature (PDY = 0V)
vs. Temperature (PDY = 0V)
9.0
8.2
7.4
6.6
5.8
5.0
5.0
4.5
4.0
3.5
3.0
250
240
230
220
210
200
VIN = 3.0V
PDY = 0V
VIN = 3.0V
PDY = 0V
VIN = 3.0V
PDY = 0V
-15
10
35
60
-40
-15
10
35
60
-40
-15
10
35
60
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
Setup Delay
Reset Timeout Delay (Option X )
vs. Temperature (PDY = VIN)
VIN Supply Current
vs. Temperature (PDY = VIN)
vs. Temperature (PDY = VIN)
7.0
6.5
6.0
5.5
5.0
9.0
8.2
7.4
6.6
5.8
5.0
250
240
230
220
210
200
VIN = 3.0V
PDY = VIN
VIN = 3.0V
PDY = VIN
VIN = 3.0V
PDY = VIN
-15
10
35
60
-40
-15
10
35
60
-40
-15
10
35
60
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
M9999-102711-A
October 2011
6
Micrel, Inc.
MIC2786/MIC2787
Typical Characteristics (Continued)
Setup Delay
vs. Input Voltage
Reset Timeout Delay (Option X )
vs. Input Voltage
VIN Supply Current
vs. Input Voltage
9.8
9.0
8.2
7.4
6.6
5.8
10.0
8.0
6.0
4.0
2.0
0.0
250
240
230
220
210
200
/MR0 = NOT ASSERTED
/MR1 = NOT ASSERTED
PDY = VIN
PDY = 0V
PDY = OPEN
0
1
2
3
4
5
6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Normalized Reset Threshold
vs. Temperature
1.060
1.040
1.020
1.000
0.980
0.960
0.940
0.920
-40
-15
10
35
60
85
TEMPERATURE (°C)
M9999-102711-A
October 2011
7
Micrel, Inc.
MIC2786/MIC2787
Timing Diagram
M9999-102711-A
October 2011
8
Micrel, Inc.
MIC2786/MIC2787
Functional Diagram
M9999-102711-A
October 2011
9
Micrel, Inc.
MIC2786/MIC2787
Application Information
Dual Manual Reset Inputs (/MR0, /MR1)
The /MR0, /MR1 input pins have integrated pull-up
resistors for the MIC2786 but require external pull-up
resistors for the MIC2787. A recommended value is
100kΩ to keep the current consumption low when the
push-button switches are pressed. The behavior of the
reset outputs is independent of the order in which the
/MR0, /MR1 inputs are driven low. If both inputs are low
for a setup delay time, only one reset pulse, of width
tRESET, is generated. Keeping both inputs low for a
longer time does not generate additional reset output
pulses.
Design and Product Advantages
The MIC2786/MIC2787 are voltage supervisor reset ICs
with dual manual reset inputs and long manual reset
setup delay times. The dual manual reset inputs and
long manual reset setup delay times help protect against
accidental system resets in applications such as smart
phones, personal navigation devices, MP3 players, and
set-top boxes (STB).
The MIC2786/MIC2787 assert and hold a reset when the
supply voltage decreases below the factory-programmed
threshold voltage. Reset is asserted for a fixed reset
timeout delay once the supply voltage increases above
the rising threshold voltage or when both manual reset
inputs are asserted low for longer than the setup delay
time.
Reset Outputs (/RST and RSTP)
The /RST output is a simple open-drain N-channel
MOSFET structure that requires a pull-up resistor to an
external voltage. For most applications, the pull-up
voltage will be the same as the power supply that
supplies VIN to the MIC2786/MIC2787. As shown in
Figure 1, it is possible to tie this resistor to some other
voltage, other than VIN, thus enabling level-shifting of the
/RST output. The pull-up voltage must be limited to 5.5V
or less to avoid damage to the MIC2786/MIC2787. The
pull-up resistor must be small enough to supply current
to the inputs and leakage paths that are driven by the
/RST output (a recommended value is 100kΩ). Leave
floating if the /RST pin is unused.
The MIC2786/MIC2787 feature manual reset setup
delay times of 2s, 4s or 6s, which are selected by the tri-
state programmable delay input pin (PDY). They are
available with factory-programmed reset timeout delays
of 140ms (min.) or 240ms (min.). Both the MIC2786 and
MIC2787 feature an active-low, open-drain reset output
(/RST) and an active-high, push-pull reset output
(RSTP). This allows flexibility for interfacing with different
microprocessors, PMICs, and load-switches. The
MIC2786 features 65kΩ pull-up resistors on the /MR0
and /MR1 inputs to provide ease when connecting to
push-button inputs. The MIC2787 does not provide pull-
up resistors on the manual reset inputs and is intended
for directly interfacing to logic outputs.
Since the /RST output is open-drain, several reset
sources can be wire-ORed, in parallel, to allow resets
from multiple sources. By tying the pull-up resistor to
some other voltage, the MIC2786/MIC2787 can monitor
one voltage while level-shifting the /RST output to some
other voltage.
Supply Bypass Capacitor
A 0.1µF input bypass capacitor must be placed from VIN
(Pin 8) to GND (Pin 2).
The RSTP pin is a push-pull output that is driven to VIN.
It cannot be level-shifted to another voltage. It is an
inverted signal of /RST.
Programmable Delay Input (PDY)
The MIC2786/MIC2787 has a programmable setup
delay time, tSETUP that is set via a tri-state logic
configuration. The PDY pin is intended to be connected
to the VIN supply voltage, ground or left floating.
PDY Configuration
tSETUP
2s
OPEN
GND
VIN
4s
6s
Figure 1. MIC2786/MIC2787 Used in Multiple Supply
System
M9999-102711-A
October 2011
10
Micrel, Inc.
MIC2786/MIC2787
Asserting /RST and RSTP Outputs
a) When Functioning as a Manual Reset
The reset outputs /RST and RSTP are asserted when
the setup delay time, tSETUP, is exceeded while the /MR0,
/MR1 pins are driven low. Both the reset outputs remain
asserted for a factory-programmed reset timeout delay
time tRESET. Two options are available with 140ms or
240ms minimum tRESET duration. The /RST pin is driven
active low while the RSTP pin is driven active high for
the tRESET duration. The reset outputs are undefined for
VIN < 1.6V.
Figure 3. Voltage Monitor Function
VIN Transients
The MIC2786/MIC2787 is relatively immune to small
negative-going VIN glitches below the reset threshold. As
shown in Figure 4, the overdrive voltage is the difference
between the threshold voltage and the minimum point of
the VIN glitch. Typically, an overdrive of 100mV, with
duration of 20μs or less will not cause a reset.
Figure 2. Manual Reset Function
b) When Functioning as a Voltage Monitor
The /RST pin is asserted whenever VIN falls below the
reset threshold voltage, VTH (VIN < VTH). The VIN pin
circuitry includes hysteresis to prevent /RST or RSTP pin
chattering due to noise. The /RST pin remains asserted
for the duration of the reset timeout delay (tRESET) after
VIN has risen above the reset threshold voltage plus the
hysteresis. The reset function ensures a microprocessor
is properly reset and powers up in a known condition
after a power failure. /RST remains valid with VIN as low
as 1.6V. The RSTP output is a compliment of the /RST
output.
Figure 4. VIN Transient
M9999-102711-A
October 2011
11
Micrel, Inc.
MIC2786/MIC2787
Typical Applications
Figure 5. MIC2786/MIC2787 Used for Interrupting System Power
Figure 6. MIC2786/MIC2787 Used for Microcontroller Reset
M9999-102711-A
October 2011
12
Micrel, Inc.
MIC2786/MIC2787
Evaluation Board Schematic
Bill of Materials
Item
Part Number
Manufacturer Description
Qty.
1
C1
GRM188R71C104KA01D
CRCW0603100KJNEA
MIC2786-XDYMT
MIC2787-XDYMT
Murata(1)
Vishay(2)
0.1µF, 16V capacitor, X7R, 0603
100k, 5% resistor, 0603
R1, R2, R4
3
U1
Micrel, Inc.(3)
Push-Button Reset IC with Supply Voltage Supervisor
1
Notes:
1. Murata Tel: www.murata.com.
2. Vishay Tel: www.vishay.com.
3. Micrel, Inc.: www.micrel.com.
M9999-102711-A
October 2011
13
Micrel, Inc.
MIC2786/MIC2787
PCB Layout Recommendations
Top Layer
Top Silkscreen
M9999-102711-A
October 2011
14
Micrel, Inc.
MIC2786/MIC2787
PCB Layout Recommendations (Continued)
Copper Layer
Bottom Silkscreen
M9999-102711-A
October 2011
15
Micrel, Inc.
MIC2786/MIC2787
Package Information
8-Pin 2mm × 2mm Thin MLF®
M9999-102711-A
October 2011
16
Micrel, Inc.
MIC2786/MIC2787
Recommended Landing Pattern
Red circle indicates Thermal Via. Size should be .300mm − .350mm in diameter and it should be connected to GND
plane for maximum thermal performance.
8-Pin 2mm × 2mm Thin MLF®
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
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whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2011 Micrel, Incorporated.
M9999-102711-A
October 2011
17
相关型号:
MIC2787-XDYMT
Power Supply Support Circuit, Fixed, 1 Channel, PDSO8, 2 X 2 MM, 0.55 MM HEIGHT, GREEN, TMLF-8
MICROCHIP
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