MIC2544-2BM [MICREL]
Programmable Current Limit High-Side Switch Preliminary Information; 可编程电流限制的高边开关的初步信息
| 型号： | MIC2544-2BM |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | Programmable Current Limit High-Side Switch Preliminary Information |
| 文件： | 总12页 (文件大小：471K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC2544/2548
Programmable Current Limit High-Side Switch
Preliminary Information
General Description
Features
The MIC2544 and MIC2548 are integrated high-side power
switches optimized for low loss dc power switching and other
power management applications, including Advanced Con-
figuration and Power Interface (ACPI). The MIC2544/48 is a
cost-effective, highly integrated solution that requires few
external components to satisfy USB and ACPI requirements.
• 2.7V to 5.5V input
• Adjustable current-limit up to 1.5A
• Reverse current flow blocking (no “body diode”)
• 75µA typical on-state supply current
• 1µA typical off-state supply current
• 120mΩ maximum on-resistance
• Open-drain fault flag
Loadcurrentmanagementfeaturesincludeaprecisionresis-
tor-programmable output current-limit and a soft-start circuit
which minimizes inrush current when the switch is enabled.
Thermal shutdown, along with current-limit, protects the
switch and the attached device.
• Thermal shutdown
• Thermal shutdown output latch (MIC2548)
• 2ms (slow) turn-on and fast turnoff
• Available with active-high or active-low enable
Applications
• USB power distribution
• PCI Bus Power Switching
• Notebook PC
• ACPI power distribution
• PC card hot swap applications
• Inrush current-limiting
The MIC2544/48’s open-drain flag output is used to indicate
current-limiting or thermal shutdown to a local controller. The
MIC2548 has an additional internal latch which turns the
output off upon thermal shutdown providing robust fault
control. The enable signal is compatible with both 3V and 5V
logic, andisalsousedasthethermalshutdownlatchresetfor
the MIC2548.
The MIC2544 and MIC2548 are available in active-high and
active-low enable versions in the 8-pin SOP (small-outline
package) and 8-pin MSOP (micro-small-outline package).
Typical Application
+5V
MIC2544-xBM
RFLG
On/Off
Peripheral
EN
OUT
IN
FLG
GND
ILIM
OUT
NC
RSET
SOP pinout shown
33µF
0.1µF
Typical Advanced Configuration and Power Interface (ACPI) Application
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
June 2000
1
MIC2544/2548
MIC2544/2548
Micrel
Ordering Information
Part Number
MIC2544-1BM
Enable
Latch*
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
8-pin SOP
8-pin MSOP
8-pin SOP
8-pin MSOP
8-pin SOP
8-pin MSOP
8-pin SOP
8-pin MSOP
Active High
MIC2544-1BMM Active High
MIC2544-2BM
MIC2544-2BMM
MIC2548-1BM
Active Low
Active Low
Active High
•
•
•
•
MIC2548-1BMM Active High
MIC2548-2BM
Active Low
Active Low
MIC2548-2BMM
* Thermal Shutdown Latch
Pin Configuration
MIC2544/2548
MIC2544/2548
EN
FLG
GND
ILIM
OUT
IN
1
2
3
4
8
7
6
5
EN
FLG
GND
NC
OUT
IN
1
2
3
4
8
7
6
5
OUT
NC
OUT
ILIM
8-Pin SOP (M)
8-Pin MSOP (MM)
MIC2544/2548
NOTE: PINS 4 AND 5
FOR SOIC AND MSOP
ARE DIFFERENT.
(OUT)
(IN)
LOGIC,
CHARGE
PUMP
(EN)
(FLG)
(ILIM) (GND)
Pin Description
Pin Number
MSOP-8
Pin Number
Pin Name
Pin Function
SOP-8
1
2
1
EN
Enable (Input): Logic-compatible enable input. Active-high (-1) or active-low
(-2). High input >1.7V typical; low input <1.5V typical. Do not float.
MIC2548 only: Also resets thermal shutdown latch.
2
FLG
Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent or
thermal shutdown conditions.
MIC2548 only: latched low on thermal shutdown.
3
5
3
4
GND
ILIM
Ground
Current Limit: Sets current-limit threshold using an external resistor, RSET
,
connected to ground. 154Ω < RSET < 2.29kΩ.
7
7
IN
Input: Output MOSFET drain. Also powers internal circuitry.
6,8
6,8
OUT
Switch (Output): Output MOSFET source. Pins 6 and 8 must be externally
connected.
4
5
NC
Not internally connected
MIC2544/2548
2
June 2000
MIC2544/2548
Micrel
Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 2)
Supply Voltage (V ) ..................................................+6.0V
Supply Voltage (V ) ................................... +2.7V to +5.5V
IN
IN
Output Voltage (V
Output Current (I
) ...............................................+6.0V
) ............................... Internally Limited
Current Limit Set Range.................................. 0.1A to 1.5A
OUT
Ambient Temperature Range (T ) ............. –40°C to +85°C
OUT
A
Enable Input (V ) ................................. –0.3V to V +0.3V
Package Thermal Resistance
EN
IN
SOP (θ ) ..........................................................160°C/W
Fault Flag Voltage (V
)...........................................+6.0V
) ............................................50mA
JA
FLG
MSOP (θ ) .......................................................206°C/W
JA
Fault Flag Current (I
FLG
Storage Temperature (T ) ....................... –65°C to +150°C
S
Junction Temperature (T ) ....................... Internally Limited
J
Lead Temperature (soldering 5 sec.) ........................ 260°C
ESD Rating, Note 3 ...................................................... 2kV
Electrical Characteristics
VIN = +5V; TA = 25°C, bold indicates –40°C to +85°C; unless noted
Symbol
Parameter
Condition
Min
2.4
Typ
0.75
75
Max
5
Units
µA
µA
V
Supply Current
switch off, OUT = open, Note 4
switch on, OUT = open, Note 4
enable high, Note 4
enable low, Note 1
VEN = VOH(min) = 2.4V
VEN = VOL(max) = 0.8V
Note 6
160
VEN
Enable Input Voltage
Enable Input Current
1.7
1.5
0.01
0.01
1
0.8
1
V
µA
µA
pF
mΩ
V
1
Enable Input Capacitance
Switch Resistance
RDS(on)
IOUT = 500mA
80
120
276
299
10
5
Current Limit Factor
I
I
= 100mA to 1A, V
= 1V to 4V, Note 5
= 1V to 4V, Note 5
184
161
230
230
1
OUT
OUT
OUT
= 500mA to 1.5A, V
V
OUT
Output Leakage Current
Output Turn-On Delay
Output Turn-On Rise Time
Output Turnoff Delay
switch off
µA
ms
ms
µs
µs
°C
°C
Ω
tON
tR
tOFF
tF
RL = 10Ω, CL = 1µF, Figures 1a, 1b
RL = 10Ω, CL = 1µF, Figures 1a, 1b
RL = 10Ω, CL = 1µF, Figures 1a, 1b
RL = 10Ω, CL = 1µF, Figures 1a, 1b
TJ increasing
1
1
2
2
5
22
Output Turnoff Fall Time
Overtemperature Threshold
Shutdown
21
140
130
4
TJ decreasing
Error Flag Output Resistance
VIN = 5V, IL = 10µA
15
20
1
VIN = 3.3V, IL = 10µA
5
Ω
Error Flag Off Current
VFLG = 5V
0.01
µA
µs
µs
µs
µs
EN Pulse Reset Width
MIC2548 thermal shutdown latch
MIC2548, Note 6
5
0
VIN to EN Set-Up
Current-Limit Response Time
Overcurrent Flag Response Time
VOUT = 0V, Note 6
25
5
VOUT = VIN/2 to FLG low
Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 4. Off is ≤ 0.8V and on is ≥ 2.4V for the MIC2544-1 and MIC2548-1. Off is ≥ 2.4V and on is ≤ 0.8V for the MIC2544-2 and MIC2548-2. The
enable input has about 200mV of hysteresis.
230V
I
=
LIMIT
Note 5. Current limit threshold is determined by
, where R
is in ohms.
SET
R
SET
Note 6. Guaranteed by design but not production tested.
June 2000
3
MIC2544/2548
MIC2544/2548
Micrel
Test Circuit
VOUT
IOUT
Device
Under
Test
OUT
RL
CL
t
r
t
f
90%
10%
90%
V
OUT
10%
Functional Characteristics Test Circuit
Timing Diagrams
50%
V
EN
t
OFF
t
ON
90%
V
OUT
10%
Figure 1a. MIC2544/48-1
50%
V
EN
t
OFF
t
ON
90%
V
OUT
10%
Figure 1b. MIC2544/48-2
MIC2544/2548
4
June 2000
MIC2544/2548
Micrel
Output Reset
Short-Circuit Fault
EN
VOUT
ILIMIT
IDC
Fault Removed
Thermal Shutdown
Reached
IOUT
FLG
Figure 2a. MIC2548-2 Timing: Output is reset by toggling EN
Short-Circuit
Fault
EN
Fault
Removed
V
OUT
I
LIMIT
I
DC
Thermal Shutdown
Reached
I
OUT
FLG
Figure 2b. MIC2544-2 Timing
June 2000
5
MIC2544/2548
MIC2544/2548
Micrel
Typical Characteristics
Output On-Resistance
vs. Supply Voltage
Output On-Resistance
vs. Temperature
On-State Supply Current
vs. Supply Voltage
100
140
120
100
80
120
100
80
90
TA = 27°C
2.7V
3.3V
80
TA = 27°C
60
70
60
5.0V
40
60
20
50
0
40
2.5 3.0 3.5 4.0 4.5 5.0 5.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
-40 -20
0
20 40 60 80 100
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
On-State Supply Current
Off-State Supply Current
vs. Supply Voltage
Off-State Supply Current
vs. Temperature
vs. Temperature
0.10
140
0.4
0.3
0.2
0.1
0
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
RL = 44Ω
120
TA = 27°C
100
5.0V
80
60
40
20
0
3.3V
5.0V
2.7V
3.3V
2.7V
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
-40 -20
0
20 40 60 80 100
-40 -20
0
20 40 60 80 100
TEMPERATURE (°C)
TEMPERATURE (°C)
Rise Time
Enable Threshold Voltage
vs. Supply Voltage
Enable Threshold Voltage
vs. Temperature
vs. Temperature
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
2.0
1.8
1.6
1.4
1.2
1.0
7
TA = 27°C
6
5
4
3
2
1
0
2.7V
VEN RISING
VEN RISING
3.3V
VEN FALLING
VEN FALLING
5.0V
RL = 44Ω
20 40 60 80 100
-40 -20
0
20 40 60 80 100
-40 -20
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
Output Fall Time
vs. Temperature
Current Limit
vs. RSET
Output Current
vs. Output Voltage
2000
1500
1000
500
0
2.5
2000
1500
1000
500
0
RL = 44Ω
VIN = 5V
RSET = 150
2.7V
2.0
1.5
1.0
0.5
0
VIN = 5V
3.3V
5.0V
RSET = 470
RSET = 2.3k
ITH
ISET
ISHORT
0
1
2
3
4
5
6
-40 -20
0
20 40 60 80 100
100
1000
(Ω)
5000
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
R
SET
MIC2544/2548
6
June 2000
MIC2544/2548
Micrel
Current Limit
vs. Temperature
Current Limit
vs. Supply Voltage
1100
1000
900
1100
1000
900
ITH
ITH
ISET
ISET
TA = 27°C
L = 230Ω
VIN = 5V
SET = 230Ω
R
R
800
800
ISHORT
ISHORT
700
700
600
600
-40 -20
0
20 40 60 80 100
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
June 2000
7
MIC2544/2548
MIC2544/2548
Micrel
Functional Characteristics
Turn-On Response
Turnoff Response
V
IN = 5V
CL = 1µF
CIN = 4.7µF RL = 10Ω
VIN = 5V
CIN = 4.7µF
CL = 1µF
RL = 10Ω
MIC2544-1
MIC2544-1
TIME (500µs/div.)
TIME (1ms/div.)
Current-Limit Response
Enable Into Heavy Load
VIN = 5V
ISET = 1A
CIN = 4.7µF RL = 1Ω
Thermal Shutdown
ISET = 1A
V
IN = 5V
CIN = 4.7µF
RL = 1Ω
MIC2544-1
MIC2544-1
TIME (100ms/div.)
TIME (100ms/div.)
Enable Into Heavy Load
Inrush Current Response
VIN = 5V
Reset
CIN = 4.7µF
RL = 1Ω
ISET = 1A
VIN = 5V
CIN = 4.7µF
RL = 10Ω
Output Latched
CL = 110µF
CL = 60µF
Thermal Shutdown
CL = 10µF
MIC2548-1
MIC2544-1
TIME (500µs/div.)
TIME (500µs/div.)
MIC2544/2548
8
June 2000
MIC2544/2548
Micrel
Block Diagram
EN
THERMAL
SHUTDOWN
1.2V
REFERENCE
IN
OSC.
ILIM
CHARGE
PUMP
CURRENT
LIMIT
GATE
CONTROL
RSET
THERMAL
SHUTDOWN
LATCH
OUT
FLG
RESET
(MIC2548)
GND
Functional Description
Adjustable Current-Limit
TheMIC2544andMIC2548arehigh-sideN-channelswitches
available with active-high or active-low enable inputs. Fault
conditions turn off or inhibit turn-on of the output transistor
andactivatetheopen-drainerrorflagtransistormakingitsink
current to ground.
Theshort-circuitcurrent-limitisuser-adjustablewithanexter-
nal set resistor. Current-limit in the range of 100mA to 1.5A is
available with a set point accuracy of better than 20%. The
current-limit circuit prevents damage to the output MOSFET
and external load.
Input and Output
Thenominalcurrent-limitvalueissetwithanexternalresistor
between ILIM and GND. For a desired current-limit, the value
of the external set resistor is given by:
INisthepowersupplyconnectiontothelogiccircuitryandthe
drain of the output MOSFET. OUT is the source of the output
MOSFET. In a typical circuit, current flows from IN to OUT
toward the load. If V
is greater than V , current will flow
OUT
IN
230V
from OUT to IN since the switch is bidirectional when en-
abled. The output MOSFET and driver circuitry are also
designedtoallowtheMOSFETsourcetobeexternallyforced
R
=
SET
I
LIMIT
where:
154Ω < R
to a higher voltage than the drain (V
> V ) when the
OUT
IN
< 2.29kΩ
switch is disabled. In this situation, the MIC2544/48 avoids
undesirablecurrentflowfromOUTtoIN. BothOUTpinsmust
be connected together.
SET
For example, to set a 1A nominal current-limit, R
calculated as:
is
SET
Thermal Shutdown
230V
1A
= 230Ω
Thermal shutdown shuts off the output MOSFET and signals
the fault flag if the die temperature exceeds 140°C. 10°C of
hysteresis prevents the switch from turning on until the die
temperature drops to 130°C. Overtemperature detection
functions only when the switch is enabled.
Current through R
voltage across R
ance comparator to provide an indication of output current.
should be between 154Ω 0.5% and 2.29kΩ 0.5%.
increases with OUT current. The
SET
could be monitored with a high imped-
SET
R
SET
TheMIC2548featuresaninternallatchwhichcausesthepart
to remain off after thermal shutdown until a reset pulse is
provided via the enable pin (pin 1). While in current-limit, the
thermal shutdown latch prevents on/off cycling of the output.
Refer to Figure 2 for timing diagram. The flag remains low
until reset.
Short-Circuit Protection
In the event of a short-circuit, the output current will fold back
to approximately 80% of the short-circuit current-limit.
Fault Flag
FLG is an N-channel, open-drain MOSFET output. The fault-
flag is active (low) for current-limit or thermal shutdown
conditions. The flag output MOSFET is capable of sinking a
10mA load to typically 100mV above ground.
Enable Input
EN must be driven logic high or logic low, or be pulled high or
low for a clearly defined input. Floating the input may cause
unpredictable operation. EN should not be allowed to go
negative with respect to GND, and V should be less than
EN
or equal to V .
IN
June 2000
9
MIC2544/2548
MIC2544/2548
Micrel
T = P × θ + T
A
where:
Applications Information
Supply Filtering
j
D
JA
T = junction temperature
j
A0.1µFto1µFbypasscapacitorfromINtoGND,locatednear
the MIC2544 and MIC2548, is strongly recommended to
control supply transients. Without a bypass capacitor, an
output short may cause sufficient ringing on the input (from
supply lead inductance) to damage internal control circuitry.
T = ambient temperature
A
θ
= is the thermal resistance of the package
JA
Transient Overcurrent Filter
The inrush current from the connection of a heavy capacitive
loadmaycausethefaultflagtofallfor10µsto200µswhilethe
switch is in a constant-current mode, charging the capaci-
tance.
Input transients must not exceed the absolute maximum
supply voltage (V
= 6V) even for a short duration.
IN max
4.0V to 5.5V
Adding an optional series resistor-capacitor (R
) in paral-
SET2
MIC2548-1BM
lel with R
, as shown in Figure 4, allows the transient
SET
1
2
3
4
8
Power
On/Off
EN
OUT
IN
Output
current-limit to be set to a different value than steady state. A
7
6
5
FLG
GND
ILIM
typical USB hot-plug inrush is 2A to 3A for 10µs to 20µs. If
R
is 435Ω (510mA), an R
of 88Ω (2.5A) and C
of
OUT
NC
SET
SET2
SET
1µF (RC = 100µs) allows transient surge of 3A to pass for
100µs without tripping the overcurrent flag (FLG).
RSET
0.1µF to 1µF
USB Power Distribution
NOTE: MSOP PACKAGE OPTION USES PIN 5 FOR I
PIN 4 IS NOT CONNECTED (NC).
.
The MIC2544 is ideal for meeting USB power distribution
LIM
requirements. Figure4depictsaUSBHostapplication. R
SET
should be set to a value providing a current-limit >500mA.
The accurate current-limit of the MIC2544 will reduce power
supply current requirements. Also, fast reaction to short
circuitfaultspreventvoltagedroopinmobilePCapplications.
Figure 3. Supply Bypassing
Power Dissipation
The device's junction temperature depends on several fac-
tors such as the load, PCB layout, ambient temperature and
package type. Equations that can be used to calculate power
dissipation and junction temperature are found below.
Printed Circuit Board Hot-Plug
The MIC2544/48 are ideal inrush current-limiters suitable for
hot-plug applications. Due to the integrated charge pump,
the MIC2544/48 presents a high impedance when off and
slowly becomes a low impedance as it turns on. This “soft-
start” feature effectively isolates power supplies from highly
capacitive loads by reducing inrush current during hot-plug
events. Figure 5 shows how the MIC2544 may be used in a
hot-plug application.
Calculation of power dissipation can be accomplished by the
following equation:
P = R
× (I
)2
D
DS(on)
OUT
To relate this to junction temperature, the following equation
can be used:
Ferrite
Bead
5V
(+)
1.5k 2%
10k
VBUS
4.7µF
100k
MIC2544-2BM
Downstream
USB
Port 1
(–)
D+
D–
MIC5203-3.3
LDO Regulator
3.3V USB Controller
0.01µF
VBUS
D+
120µF
4.75V min.
500mA max.
V+
OVERCURRENT
IN
OUT
ON/OFF
EN
OUT
IN
GND
1.0
µF
FLG
GND
ILIM
D–
GND
OUT
NC
GND
0.1µF
D+
D–
RSET
RSET(2)
CSET
GND
Bold lines indicate
0.1" wide, 1-oz. copper
high-current traces.
(optional)
NOTE: MSOP PACKAGE OPTION USES PIN 5 FOR I
PIN 4 IS NOT CONNECTED (NC).
.
LIM
Figure 4. USB Host Application
MIC2544/2548
10
June 2000
MIC2544/2548
Micrel
MIC2544-2BM
1
2
3
4
8
7
6
5
VCC
EN
OUT
IN
FLG
GND
0.1
µF
Backend
Function
to "Hot"
OUT
NC
Receptacle
I
LIM
CBULK
0.1µF
GND
Adaptor Card
NOTE: MSOP PACKAGE OPTION USES PIN 5 FOR I
AND PIN 4 IS NO CONNECT (NC).
LIM
Figure 5. Hot Plug Application
June 2000
11
MIC2544/2548
MIC2544/2548
Micrel
Package Information
0.026 (0.65)
MAX)
PIN 1
0.157 (3.99)
0.150 (3.81)
DIMENSIONS:
INCHES (MM)
0.020 (0.51)
0.013 (0.33)
0.050 (1.27)
TYP
45°
0.0098 (0.249)
0.0040 (0.102)
0.010 (0.25)
0.007 (0.18)
0°–8°
0.197 (5.0)
0.189 (4.8)
0.050 (1.27)
0.016 (0.40)
SEATING
PLANE
0.064 (1.63)
0.045 (1.14)
0.244 (6.20)
0.228 (5.79)
8-Pin SOP (M)
0.122 (3.10)
0.112 (2.84)
0.199 (5.05)
0.187 (4.74)
DIMENSIONS:
INCH (MM)
0.120 (3.05)
0.116 (2.95)
0.036 (0.90)
0.032 (0.81)
0.043 (1.09)
0.038 (0.97)
0.012 (0.30) R
0.007 (0.18)
0.005 (0.13)
0.008 (0.20)
0.004 (0.10)
5° MAX
0° MIN
0.012 (0.03)
0.012 (0.03) R
0.039 (0.99)
0.0256 (0.65) TYP
0.035 (0.89)
0.021 (0.53)
8-Pin MSOP (MM)
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2000 Micrel Incorporated
MIC2544/2548
12
June 2000
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SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9135LG-T1-E3
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9135_11
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9136_11
Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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