LTC1574CS-3.3 [Linear]
High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode; 高效率降压型，内置肖特基二极管的DC / DC转换器
| 型号： | LTC1574CS-3.3 |
| 厂家： | 
Linear |
| 描述： | High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode |
| 文件： | 总8页 (文件大小：228K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1574
LTC1574-3.3/LTC1574-5
High Efficiency Step-Down
DC/DC Converters
with Internal Schottky Diode
U
FEATURES
DESCRIPTION
The LTC®1574 is a family of easy-to-use current mode
DC/DC converters ideally suited for 9V to 5V, 5V to 3.3V
and inverting operation. With an internal 0.9Ω switch (at
a supply voltage of 12V) and a low forward drop Schottky
diode (0.450V typ at 200mA, TA = 25°C), the LTC1574
requires only three external components to construct a
complete high efficiency DC/DC converter.
■
High Efficiency: Up to 94%
■
Usable in Noise-Sensitive Products
■
Peak Inductor Current Independent of Inductor Value
■
Short-Circuit Protection
■
Internal Low Forward Drop Schottky Diode
■
Only Three External Components Required
■
Wide VIN Range: 4V to 18.5V (Absolute Maximum)
Low Dropout Operation
Low-Battery Detector
■
Under no load condition, the LTC1574 draws only 130µA.
In shutdown, it draws a mere 2µA making this converter
ideal for battery-powered applications. In dropout, the
internal P-channel MOSFET switch is turned on continu-
ously allowing the user to maximize the life of the battery
source.
■
■
Pin Selectable Current Limit
■
Internal 0.9Ω Power Switch: VIN = 12V
■
Standby Current: 130µA
■
Active Low Micropower Shutdown
U
The maximum inductor current of the LTC1574 family is
pin selectable to either 340mA or 600mA, optimizing
efficiency for a wide range of applications. Operation up to
200kHz permits the use of small surface mount inductors
and capacitors.
APPLICATIONS
■
Inverting Converters
■
Step-Down Converters
■
Memory Backup Supply
■
Portable Instruments
For applications requiring higher output current or ultra-
highefficiency,seetheLTC1148andLTC1265datasheets.
For detailed applications information, see the LTC1174
data sheet.
■
Battery-Powered Equipment
■
Distributed Power Systems
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
U
TYPICAL APPLICATION
LTC1574-5 Efficiency
High Efficiency Step-Down Converter
100
V
IN
L = 100µH
5.5V to
16V
V
= 5V
= 0V
OUT
I
PGM
95
90
85
80
75
70
V
= 6V
= 9V
+
IN
5
22µF*
V
35V
IN
12
11
6
7
LB
LB
SHDN
IN
V
IN
10
LTC1574-5
V
OUT
OUT
†
100µH
5V
175mA
3, 14
I
SW
PGM
+
100µF*
10V
GND
2, 4, 13, 15
*
AVX TPSD226K035
1574 TA01
** AVX TPSD107K010
1
10
LOAD CURRENT (mA)
100 200
†
COILTRONICS CTX100-4
1574 TA02
1
LTC1574
LTC1574-3.3/LTC1574-5
W W U W
U
W U
ABSOLUTE MAXIMUM RATINGS
(Voltage Referred to GND Pin)
PACKAGE/ORDER INFORMATION
TOP VIEW
ORDER PART
Input Supply Voltage (Pin 5).................. –0.3V to 18.5V
Switch Current (Pin 3, 14) ........................................ 1A
Switch Voltage (Pin 3, 14) .......................... VIN – 18.5V
Operating Temperature Range .................... 0°C to 70°C
Junction Temperature (Note 1)............................ 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
NUMBER
NC
GND
SW
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
GND
SW
LTC1574CS
LTC1574CS-3.3
LTC1574CS-5
GND
GND
V
LB
IN
IN
I
LB
OUT
PGM
SHDN
V
(V *)
OUT FB
NC
NC
S PACKAGE
16-LEAD PLASTIC SO
*ADJUSTABLE OUTPUT VERSION
= 125°C, θ = 110°C/W
T
JMAX
JA
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS TA = 25°C, VIN = 9V, VSHUTDOWN = VIN, IPGM = 0V, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
I
Feedback Current into Pin 10
Feedback Voltage
LTC1574
1
µA
FB
V
V
LTC1574
●
1.20
1.25
1.30
V
FB
Regulated Output Voltage
LTC1574-3.3
LTC1574-5
●
●
3.14
4.75
3.30
5.00
3.46
5.25
V
V
OUT
∆V
Output Voltage Line
Regulation
V
= 6V to 12V, I
= 100mA, I
= V (Note 2)
10
70
mV
OUT
IN
LOAD
PGM
IN
Output Voltage Load
Regulation
LTC1574-3.3 (Note 2) 20mA < I
20mA < I
< 175mA, I
< 400mA, I
= 0V
–5
–45
–70
–70
mV
mV
LOAD
LOAD
PGM
PGM
= V
IN
LTC1574-5 (Note 2)
20mA < I
20mA < I
< 175mA, I
< 400mA, I
= 0V
–5
–50
–70
–70
mV
mV
LOAD
LOAD
PGM
PGM
= V
IN
I
Input DC Supply Current (Note 3)
Active Mode
Q
4V < V < 16V, I
= 0V
450
130
2
600
180
25
µA
µA
µA
IN
PGM
Sleep Mode
Shutdown (Note 4)
4V < V < 16V
IN
= 0V, 4V < V < 16V
SHUTDOWN IN
V
V
Low-Battery Trip Point
Current into Pin 12
1.25
1.4
0.5
V
LBTRIP
I
I
µA
LBIN
Current Sunk by Pin 11
V
V
= 0.4V, V = 0V
LBIN
0.5
7.5
1.0
15
1.5
1.0
mA
µA
LBOUT
LBOUT
LBOUT
= 5V, V
= 10V
LBIN
V
Comparator Hysteresis
Current Limit
30
mV
HYST
I
I
I
= V , V
= 0V
= 0V
●
●
0.54
0.27
0.60
0.34
0.78
0.50
A
A
PEAK
PGM
PGM
IN OUT
= 0V, V
OUT
R
ON Resistance of Switch
Switch Off Time
●
0.9
4
1.55
5
Ω
µs
V
ON
t
V
at Regulated Value
OUT
3
OFF
V
V
Shutdown Pin High
Minimum Voltage at Pin 7 for Device to Be Active
Maximum Voltage at Pin 7 for Device to Be in Shutdown
= 16V
1.2
IH
IL
Shutdown Pin Low
0.75
2
V
I
Shutdown Pin Input Current
V
µA
IH
SHUTDOWN
2
LTC1574
LTC1574-3.3/LTC1574-5
TA = 25°C, VIN = 9V, VSHUTDOWN = VIN, IPGM = 0V, unless otherwise specified.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
I
Shutdown Pin Input Current
Schottky Diode Forward Voltage
Schottky Reverse Current
0 ≤ V
≤ 0.8V
SHUTDOWN
0.5
0.450 0.570
µA
IL
V
Forward Current = 200mA
V
F
I
Reverse Voltage = 5V
Reverse Voltage = 18.5V
10
25
250
µA
µA
R
100
Note 3: Does not include Schottky reverse current. Dynamic supply
current is higher due to the gate charge being delivered at the switching
frequency.
The
temperature range.
Note 1: T is calculated from the ambient temperature T and power
● denotes specifications which apply over the full operating
J
A
dissipation P according to the following formulas:
Note 4: Current into Pin 5 only, measured without electrolytic input
capacitor.
D
T = T + (P × 110°C/W)
J
A
D
Note 2: Guaranteed by Design.
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
Efficiency vs Load Current
Efficiency vs Input Voltage
100
95
90
85
80
75
70
95
94
93
92
91
90
89
100
90
80
70
60
50
V
= 5V
OUT
L = 100µH
V
= 5V
IN
COIL = CTX100-4
V
IN
= 6V
V
= 9V
IN
V
= 9V
IN
I = 100mA
LOAD
I = 0V
PGM
I
= 300mA
= V
LOAD
I
PGM
IN
L = 50µH
L = 50µH
V
I
= 5V
V
I
= 3.3V
OUT
PGM
OUT
PGM
= V
= V
IN
IN
COIL = CTX50-4
COIL = CTX50-4
1
10
100 400
5
6
7
8
9
10 11 12 13 14
1
10
100 500
LOAD CURRENT (mA)
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
1574 • TPC02
1574 • TPC01
1574 • TPC03
Efficiency Using Different Types
of Inductor Core Material
Switch Leakage Current
vs Temperature
Switch Resistance vs
Input Voltage
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
180
160
140
120
100
80
100
90
80
70
60
50
V
IN
= 13.5V
T
= 25°C
A
CTX50-4
CTX50-4P
60
40
V
V
PGM
= 5V
IN
= 3.3V
IN
OUT
20
I
= V
0
4
6
8
10 12 14 16 18 20
INPUT VOLTAGE (V)
1574 • TPC06
0
20
40
60
80
100
1
10
100
500
TEMPERATURE (°C)
LOAD CURRENT (mA)
1574 • TPC04
1574 • TPC05
3
LTC1574
LTC1574-3.3/LTC1574-5
U
U
U
PIN FUNCTIONS
VOUT or VFB (Pin 10): For the LTC1574, this pin connects
o the main voltage comparator input. On the LTC1574-5
and LTC1574-3.3, this pin goes to an internal resistive
divider which sets the output voltage
NC (Pins 1, 8, 9, 16): No Connection.
t
GND (Pins 2, 4, 13, 15): Ground.
SW (Pins 3, 14): Drain of P-Channel MOSFET Switch and
Cathode of Schottky Diode.
.
LBOUT (Pin 11): Open drain of an N-Channel Pull-Down.
This pin will sink current when (Pin 12) LBIN goes below
1.25V.
VIN (Pin 5): Input Supply Voltage. It must be decoupled
close to ground (Pin 4).
IPGM (Pin 6): This pin selects the current limit of the
P-channel switch. With IPGM = VIN, the current trip point is
600mA and with IPGM = 0V, the current trip point is
reduced to 340mA.
LBIN (Pin 12): The (–) Input of the Low-Battery Voltage
Comparator. The (+) input is connected to a reference
voltage of 1.25V.
SHDN (Pin 7): Pulling this pin to ground keeps the internal
switch off and puts the LTC1574 in micropower shutdown.
U
W U U
APPLICATIONS INFORMATION
Operating Frequency and Inductor
IPGM pin, the limit is either set to 340mA or 600mA. In
addition, the off-time of the switch is increased to allow the
inductor current to decay far enough to prevent any current
build-up (see Figure 1).
Since the LTC1574 utilizes a constant off-time architecture,
itsoperatingfrequencyisdependentonthevalueofVIN.The
frequency of operation can be expressed as:
V − VOUT
1
tOFF
IN
f =
Hz
( )
V + V
IN
D
IPGM = VIN
where tOFF = 4µs and VD is the voltage drop across the
internal Schottky diode. Note that the operating frequency
is a function of the input and output voltage.
IPGM = 0
Although the size of the inductor does not affect the fre-
quency or inductor peak current, it does affect the ripple
current. The peak-to-peak ripple current is given by:
GND
V
+ V
D
L
−6
OUT
1574 • F01
I
= 4 ×10
A
P-P
(
)
L = 100µH
IN = 13.5V
20µs/DIV
RIPPLE
V
Figure 1. Inductor Current with Output Shorted
By choosing a smaller inductor, a low ESR (Effective Series
Resistance) output filter capacitor has to be used. Core loss
will increase due to higher ripple current.
Low-Battery Detector
Thelow-batteryindicatorsensestheinputvoltagethrough
anexternalresistivedivider.Thisdividedvoltageconnects
to the “–” input of a voltage comparator (Pin 12) which is
comparedwitha1.25Vreferencevoltage. Withthecurrent
Short-Circuit Protection
The LTC1574 is protected from output short circuits by its
internal current limit. Depending on the condition of the
4
LTC1574
LTC1574-3.3/LTC1574-5
U
W U U
APPLICATIONS INFORMATION
going into Pin 12 being negligible, the following expres-
sion is used for setting the trip limit:
differencebetweentheabsolutemaximumvoltagerating
and the output voltage. A maximum of 12V is specified in
Figure4,givingthecircuit1.5VofheadroomforVIN.Note
that the circuit can operate from a minimum of 4V,
making it ideal for a four NiCd cell application. For a
higher output current circuit, please refer to the Typical
Applications section.
R4
R3
V
= 1.25 1+
LBTRIP
V
IN
LTC1574
R4
R3
12
INPUT VOLTAGE
4V TO 12V
–
+
+
+
+
1.25V
5
2 × 47µF*
0.1µF
REFERENCE
V
16V
IN
12
11
6
7
1574 • F02
LB
LB
SHDN
IN
10
V
Figure 2. Low-Battery Comparator
OUT
OUT
50µH**
3, 14
I
SW
PGM
LTC1574 Adjustable Applications
LTC1574-5
GND
2 × 47µF*
16V
V
The LTC1574 develops a 1.25V reference voltage between
the feedback terminal (Pin 10) and ground (see Figure 3).
By selecting resistor R1, a constant current is caused to
flow through R1 and R2 to set the overall output voltage.
The regulated output voltage is determined by:
2, 4, 13, 15
OUT
–5V
45mA
AVX TPSD476K016
COILTRONICS CTX50-4
*
**
1574 • F04
Figure 4. Positive-to-Negative 5V Converter
Low Noise Regulators
2
R
V
= 1.25 1 +
In some applications it is important not to introduce any
switching noise within the audio frequency range. Due to
the nature of the LTC1574 during Burst ModeTM operation,
there is a possibility that the regulator will introduce audio
noise at some load currents. To circumvent this problem,
a feed-forward capacitor can be used to shift the noise
spectrum up and out of the audio band. Figure 5 shows the
low noise connection with C2 being the feed-forward
capacitor. The peak-to-peak output ripple is reduced to
30mV over the entire load range. A toroidal surface mount
Burst Mode is a trademark of Linear Technology Corporation
OUT
R1
For most applications, a 30k resistor is suggested for R1.
To prevent stray pickup, a 100pF capacitor is suggested
across R1 located close to the LTC1574.
V
OUT
R2
R1
10
LTC1574
V
FB
100pF
V
5V
IN
1574 • F03
+
5
100µF*
10V
V
IN
Figure 3. LTC1574 Adjustable Configuration
LTC1574
7
12
11
6
L1**
100µH
LB
LB
SHDN
SW
IN
Inverting Applications
V
OUT
3.3V
425mA
3, 14
10
OUT
C2
6.8nF
The LTC1574 can easily be set up for a negative output
voltage. If –5V is desired, the LTC1574-5 is ideal for this
application as it requires the least components. Figure 4
shows the schematic for this application. Note that the
output voltage is now taken off the GND pins. Therefore,
the maximum input voltage is now determined by the
56k
I
V
FB
PGM
+
GND
100µF*
10V
33k
2, 4, 13, 15
*
AVX TPSD107K010
** COILTRONICS CTX100-4
1574 • F05
Figure 5. Low Noise 5V to 3.3V Regulator
5
LTC1574
LTC1574-3.3/LTC1574-5
U
W U U
APPLICATIONS INFORMATION
inductor L1 is chosen for its excellent self-shielding prop-
erties. Open magnetic structures such as drum and rod
cores are to be avoided since they inject high flux levels
into their surroundings. This can become a major source
of noise in any converter circuit.
V
+ V
D
L
−6
OUT
I
= 4 ×10
A
P-P
(
)
RIPPLE
Solving for L in the above equation and with VD = 0.5V,
L = 44µH. The next higher standard value of L is 50µH
(example:CoiltronicsCTX50-4).Theoperatingfrequency,
ignoring voltage across diode VD is:
Design Example
As a design example, assume VIN = 9V (nominal),
VOUT = 5V and IOUT = 350mA maximum. The LTC1574-5
is used for this application with IPGM (Pin 6) connected to
VIN. The minimum value of L is determined by assuming
the LTC1574-5 is operating in continuous mode.
V
V
5
OUT
f ≈ 2.5 ×10 1−
IN
= 111kHz
With the value of L determined, the requirements for CIN
and COUT are calculated. For CIN, its RMS current rating
should be at least:
I
PEAK
= I
OUT
AVG CURRENT
I
+ I
V
PEAK
2
=
I
V
1/ 2
]
I
V
V − V
(
)
OUT
[
OUT IN OUT
= 350mA
I
=
A
RMS
(
)
RMS
V
IN
= 174mA
TIME
1574 • F06
For COUT, the RMS current rating should be at least:
Figure 6. Continuous Inductor Current
IPEAK
2
= 300mA
WithIOUT =350mAandIPEAK =0.6A(IPGM =VIN),IV =0.1A.
The peak-to-peak ripple inductor current, IRIPPLE, is 0.5A
and is also equal to:
IRMS
≈
A
RMS
(
)
U
TYPICAL APPLICATIONS
Low Noise, High Efficiency 3.3V Regulator
V
IN
4V TO 12.5V
+
22µF*
25V
5
0.1µF
V
IN
× 2
6
12
11
7
I
SHDN
PGM
10
LB
LB
V
FB
LTC1574
GND
IN
†
6.8nF
56k
50µH
V
OUT
3, 14
SW
3.3V
OUT
450mA
100µF**
10V
× 2
+
100pF
2, 4, 13, 15
*
AVX TPSD226K025
33k
** AVX TPSD107K010
†
COILTRONICS CTX50-4
1574 TA03
6
LTC1574
LTC1574-3.3/LTC1574-5
U
TYPICAL APPLICATIONS
Low Dropout 5V Step-Down Regulator with Low-Battery Detection
V
IN
5.5V to 12.5V
5
+
+
47µF**
16V
4.7k
0.1µF
V
IN
× 2
*LOW-
BATTERY
INDICATOR
*
LOW-BATTERY INDICATOR IS
6
11
12
7
I
SHDN
SET UP TO TRIP AT V= 5.5V
PGM
IN
** AVX TPSD476K016
10
LB
LB
V
OUT
162k
LTC1574-5
GND
OUT
IN
†
SELECTION
V
3, 14
OUT
MANUFACTURER
COILTRONICS
SUMIDA
PART NO.
CTX100-4
CD75-101
GA10-103K
TYPE
SW
5V
L1
100µH
SURFACE MOUNT
SURFACE MOUNT
THROUGH HOLE
†
365mA
47µF**
16V
× 2
47.5k
2, 4, 13, 15
GOWANDA
1574 TA04
High Efficiency 3.3V Regulator
V
IN
4V TO 12.5V
+
22µF*
5
0.1µF
25V
V
IN
× 2
7
6
12
11
I
SHDN
PGM
10
LB
LB
V
OUT
IN
LTC1574-3.3
†
50µH
V
OUT
3, 14
SW
3.3V
OUT
425mA
+
47µF*
16V
× 2
GND
2, 4, 13, 15
*
AVX TPSD226K025
** AVX TPSD476K016
1574 TA05
†
COILTRONICS CTX50-4
Positive to –5V Converter
V
IN
4V TO 12.5V
V (V)
IN
4
6
8
10
I
(mA)
110
140
170
200
235
OUT
5
+
+
10µF**
4.7k
*
LOW-BATTERY INDICATOR IS
SET TO TRIP AT V= 4.4V
0.1µF
35V
V
IN
IN
× 2
*LOW-
BATTERY
INDICATOR
** AVX TPSD106K035
*** AVX TPSD107K010
6
11
12
7
I
SHDN
PGM
10
12.5
†
LB
LB
V
OUT
SELECTION
MANUFACTURER PART NO.
COILTRONICS
COILCRAFT
SUMIDA
280k
OUT
IN
LTC1574-5
GND
TYPE
SURFACE MOUNT
DT3316-473 SURFACE MOUNT
3, 14
SW
CTX50-3
†
L1
50µH
100µF***
10V
43k
CD54-470
SURFACE MOUNT
THROUGH HOLE
2, 4, 13, 15
V
GOWANDA
GA10-472K
OUT
–5V
1574 TA06
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
7
LTC1574
LTC1574-3.3/LTC1574-5
U
PACKAGE DESCRIPTION
Dimension in inches (millimeters) unless otherwise noted.
S Package
16-Lead Plastic SOIC
0.386 – 0.394*
(9.804 – 10.008)
16
15
14
13
12
11
10
9
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
5
7
8
1
2
3
4
6
0.010 – 0.020
(0.254 – 0.508)
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.008 – 0.010
(0.203 – 0.254)
0° – 8° TYP
0.050
(1.270)
TYP
0.014 – 0.019
(0.355 – 0.483)
0.016 – 0.050
0.406 – 1.270
SO16 0695
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
RELATED PARTS
PART NUMBER
LT®1076
DESCRIPTION
COMMENTS
Step-Down Switching Regulator
2A Monolithic Bipolar Switcher for V to 60V
IN
LTC1174
High Efficiency Step-Down/Inverting DC/DC Converter
1.2A, High Efficiency Step-Down DC/DC Converter
1.5A, 500kHz Step-Down Switching Regulator
Same as LTC1574 Without Schottky Diode in SO-8 Package
Current Mode with 0.3Ω Switch for Higher Current
High Frequency, Synchronizable in SO-8 Package
LTC1265
LT1375/LT1376
LT/GP 0795 6K • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
8
●
●
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
LINEAR TECHNOLOGY CORPORATION 1995
相关型号：
SI9130DB
5- and 3.3-V Step-Down Synchronous ConvertersWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
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
-
VISHAY
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
-
VISHAY
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
-
VISHAY
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
-
VISHAY
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
-
VISHAY
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
-
VISHAY
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
-
VISHAY
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
-
VISHAY
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
-
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
-
VISHAY
©2020 ICPDF网 联系我们和版权申明