CAT4201V-GT3 [ONSEMI]

LED 驱动器,350 mA,步降转换器;
CAT4201V-GT3
型号: CAT4201V-GT3
厂家: ONSEMI    ONSEMI
描述:

LED 驱动器,350 mA,步降转换器

驱动 显示驱动器 转换器 驱动程序和接口
文件: 总15页 (文件大小:255K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
CAT4201  
350mA High Efficiency Step Down LED Driver  
FEATURES  
DESCRIPTION  
„ LED drive current up to 350mA  
The CAT4201 is a high efficiency step-down converter  
optimized to drive high current LEDs. A patented  
switching control algorithm allows highly efficient and  
accurate LED current regulation. A single RSET  
resistor sets the full scale LED string current up to  
350mA from supplies as high as 36V.  
„ Compatible with 12V and 24V standard systems  
„ Handles transients up to 40V  
„ Single Pin Control and Dimming function  
„ Power Efficiency up to 94%  
„ Drives LED strings of up to 32V  
The switching architecture of the CAT4201 results in  
extremely low internal power dissipation allowing the  
device to be housed in a tiny package without the  
need for dedicated heat sinking. The device is  
compatible with switching frequencies of up to 1MHz,  
making it ideal for applications requiring small footprint  
and low value external inductors.  
„ Open and short LED protection  
„ Parallel configuration for higher output current  
„ RoHS-compliant TSOT-23 5-lead package  
APPLICATIONS  
„ 12V and 24V Lighting Systems  
„ Automotive and Aircraft Lighting  
„ General lighting  
Analog dimming and LED shutdown control is  
provided via a single input pin, CTRL. Additional  
features include overload current protection and  
thermal shutdown. The device is available in the low  
profile 5-lead thin SOT23 package and is ideal for  
space constrained applications.  
„ High Brightness 350mA LEDs  
ORDERING INFORMATION  
Quantity  
per Reel  
Package  
Marking  
Part Number  
CAT4201TD-GT3  
* Plated Finish: NiPdAu  
3000  
TF  
For Ordering Information details, see page 14.  
PIN CONFIGURATION  
TYPICAL APPLICATION CIRCUIT  
Bulb Replacement  
VBAT  
TSOT-23 5-lead  
9V  
C1  
1
2
3
5
CTRL  
GND  
VBAT  
SW  
4.7µF  
D
C2  
CAT4201  
VBAT  
CAT4201  
300mA  
10µF  
4
RSET  
RSET  
R1  
L
CTRL  
SW  
(Top View)  
10k  
22µH  
GND  
D: Central Schottky CMDSH05-4  
L: Sumida CDRH6D26-220  
See Table 1 on page 6 for external component selection.  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
1
Doc. No. MD-5025 Rev. E  
CAT4201  
ABSOLUTE MAXIMUM RATINGS(1)  
Parameters  
Ratings  
-0.3 to +40  
-0.3 to +5  
1
Units  
V
VBAT, SW, CTRL  
RSET  
V
Switch SW peak current  
Storage Temperature Range  
Junction Temperature Range  
Lead Temperature  
A
-65 to +160  
-40 to +150  
300  
°C  
°C  
°C  
RECOMMENDED OPERATING CONDITIONS  
Parameters  
VBAT voltage (2) (3)  
Ratings  
6.5 to 36 (2)  
0 to 36  
Units  
V
V
SW voltage  
-40 to +125  
50 to 350  
50 to 1000  
Ambient Temperature Range  
LED Current  
°C  
mA  
kHz  
Switching Frequency  
ELECTRICAL CHARACTERISTICS  
VIN = 13V, ambient temperature of 25ºC (over recommended operating conditions unless specified otherwise)  
Symbol  
Parameter  
Conditions  
Min  
Typ  
Max Units  
Operating Supply Current on  
VBAT pin  
IQ  
0.4  
1
mA  
Idle Mode Supply Current on  
VBAT pin  
ISD  
CTRL = GND  
90  
µA  
V
VFB  
RSET Pin Voltage  
2 LEDs with ILED= 300mA  
1.15  
270  
1.2  
1.25  
330  
R1 = 33k  
R1 = 10kꢀ  
R1 = 8.25kꢀ  
100  
300  
350  
ILED  
Programmed LED Current  
mA  
CTRL Voltage for 100%  
Brightness  
VCTRL-FULL  
VCTRL-EN  
VCTRL-SD  
ICTRL  
2.6  
0.9  
0.9  
3.1  
1.2  
V
V
CTRL Voltage to Enable  
LEDs  
LED enable voltage threshold  
LED disable voltage threshold  
CTRL Voltage to Shutdown  
LEDs  
0.4  
V
VCTRL = 3V  
VCTRL = 12V  
µA  
40  
200  
80  
CTRL pin input bias  
RSW  
TSD  
THYST  
η
Switch “On” Resistance  
Thermal Shutdown  
Thermal Hysteresis  
Efficiency  
ISW = 300mA  
0.9  
150  
20  
1.5  
ºC  
ºC  
%
Typical Application Circuit  
86  
Notes:  
(1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings  
only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this  
specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.  
(2) The VBAT pin voltage should be at least 3V greater than the total sum of the LED forward voltages in order to operate at nominal LED  
current.  
(3) During power-up, the slew rate of the input supply should be greater than 1µs for every 5V increase of VBAT.  
Doc. No. MD-5025 Rev. E  
2
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
CAT4201  
TYPICAL OPERATION CHARACTERISTICS  
VIN = 13V, ILED = 300mA, L = 22μH, C1= 4.7μF, C2 = 10μF, TAMB = 25°C unless otherwise specified  
Input Operating Supply Current  
Idle Mode Supply Current (CTRL = 0V)  
1.0  
200  
150  
100  
50  
0.8  
0.6  
0.4  
0.2  
0.0  
0
8
10 12 14 16 18 20 22 24  
INPUT VOLTAGE [V]  
0
4
8
12 16  
20 24  
INPUT VOLTAGE [V]  
CTRL Input Bias Current  
RSET Voltage vs. Temperature  
250  
1.30  
VIN = 13V  
200  
150  
100  
50  
1.25  
1.20  
1.15  
1.10  
0
-40  
0
40  
80  
120  
0
2
4
6
8
10  
12  
TEMPERATURE [°C]  
CTRL VOLTAGE [V]  
RSET Voltage vs. CTRL Voltage  
LED Current vs. RSET  
1.4  
400  
300  
200  
100  
0
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
0.0  
+25°C  
-40°C  
+ 85°C  
5
10 15 20 25 30 35  
0
1
2
3
4
RSET [k]  
CTRL VOLTAGE [V]  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
3
Doc. No. MD-5025 Rev. E  
CAT4201  
TYPICAL OPERATION CHARACTERISTICS  
VIN = 13V, ILED = 300mA, L = 22μH, C1= 4.7μF, C2 = 10μF, TAMB = 25°C unless otherwise specified  
Switching Frequency vs. Input Voltage (2 LEDs)  
Switching Frequency vs. Input Voltage (1 LED)  
700  
600  
500  
400  
300  
200  
100  
0
500  
150mA  
300mA  
400  
150mA  
300  
200  
300mA  
100  
0
8
12  
16  
20  
24  
28  
8
12  
16  
20  
24  
28  
INPUT VOLTAGE [V]  
INPUT VOLTAGE [V]  
Switching Frequency vs. Temperature  
Switch ON Resistance vs. Input Voltage  
500  
2
VIN = 13V  
1.6  
1.2  
0.8  
0.4  
0
150mA  
400  
300  
300mA  
200  
100  
-40  
0
40  
80  
120  
8
10 12 14 16 18 20 22 24  
INPUT VOLTAGE [V]  
TEMPERATURE [°C]  
Efficiency vs. Input Voltage (2 LEDs)  
Efficiency vs. Input Voltage (1 LED)  
100  
100  
150mA  
95  
95  
90  
90  
150mA  
85  
85  
300mA  
80  
80  
75  
70  
300mA  
75  
70  
8
10 12 14 16 18 20 22 24  
INPUT VOLTAGE [V]  
8
10 12 14 16 18 20 22 24  
INPUT VOLTAGE [V]  
Doc. No. MD-5025 Rev. E  
4
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
CAT4201  
TYPICAL OPERATION CHARACTERISTICS  
VIN = 13V, ILED = 300mA, L = 22μH, C1= 4.7μF, C2 = 10μF, TAMB = 25°C unless otherwise specified  
LED Current Regulation vs. Temperature  
Efficiency vs. LED Current  
10  
100  
95  
90  
85  
80  
75  
70  
VIN = 13V  
8
6
4
2 LEDs  
2
0
-2  
-4  
-6  
-8  
-10  
1 LED  
100 150 200 250 300 350  
LED CURRENT [mA]  
-40  
0
40  
80  
120  
TEMPERATURE [°C]  
LED Current vs. Input Voltage (2 LEDs)  
LED Current vs. Input Voltage (1 LED)  
350  
350  
VF = 3.3V  
VF = 3.3V  
300  
300  
300mA  
250  
300mA  
250  
200  
200  
VF = 3.1V  
150  
VF = 3.1V  
150  
150mA  
150mA  
100  
100  
50  
0
50  
0
0
4
8
12 16 20 24 28  
0
4
8
12 16 20 24 28  
INPUT VOLTAGE [V]  
INPUT VOLTAGE [V]  
Switching Waveforms  
CTRL Power-up  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
5
Doc. No. MD-5025 Rev. E  
CAT4201  
TYPICAL OPERATION CHARACTERISTICS  
VIN = 13V, ILED = 300mA, L = 22μH, C1= 4.7μF, C2 = 10μF, TAMB = 25°C unless otherwise specified  
RSET Transient Response  
Line Transient Response (10V to 13V)  
EXTERNAL COMPONENT SELECTION  
Table  
1
provides the recommended external  
relative to the LED current accuracy, LED ripple  
current, switching frequency and component size.  
components L and C2 that offer the best performance  
1 LED  
2 LEDs  
LED current  
(mA)  
L inductor  
(µH)  
C2 Capacitor  
(µF)  
L inductor  
(µH)  
C2 Capacitor  
(µF)  
10  
22  
33  
47  
2.2  
4.7  
4.7  
10  
150  
22  
47  
4.7  
2.2  
< 150  
Table 1. External Component Selection  
Note: Larger C2 capacitor values allow to reduce further the LED ripple current if needed.  
Doc. No. MD-5025 Rev. E  
6
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
CAT4201  
PIN DESCRIPTION  
Pin Name Function  
1
2
3
4
5
CTRL Analog dimming control and shutdown pin.  
GND Ground reference.  
RSET RSET pin. A resistor connected between the pin and ground sets the average LED current.  
SW Interface to the inductor.  
VBAT Supply voltage for the device.  
PIN FUNCTION  
VBAT is the supply input to the device. Typical current  
conduction into this pin is less than 1mA and voltage  
transients of up to 40V can be applied. To ensure  
accurate LED current regulation, the VBAT voltage  
should be 3V higher than the total forward voltage of  
the LED string. A bypass capacitor of 4.7µF or larger  
is recommended between VBAT and GND.  
GND is the ground reference pin. This pin should be  
connected directly to the ground plane on the PCB.  
SW pin is the drain terminal of the internal low  
resistance high-voltage power MOSFET. The inductor  
and the Schottky diode anode should be connected to  
the SW pin. Voltages of up to 40V can be safely  
handled on the SW pin. Traces going to the SW pin  
should be as short as possible with minimum loop  
area. The device can handle safely “open-LED” or  
“shorted-LED” fault conditions.  
CTRL is the analog dimming and control input. An  
internal pull-down current of 20µA allows the LEDs to  
shutdown if CTRL is left floating. Voltages of up to  
40V can be safely handled by the CTRL input pin.  
RSET pin is regulated at 1.2V. A resistor connected  
between the RSET pin and ground sets the LED full-  
scale brightness current. The external resistance  
value and the CTRL pin voltage determine the LED  
current during analog dimming.  
When the CTRL voltage is less than 0.9V (typ), the  
LEDs will shutdown to zero current. When the CTRL  
voltage is greater than about 2.6V, full scale  
brightness is applied to the LED output. At voltages of  
less than around 2.6V, the LED current is  
progressively dimmed until shutdown.  
For lamp replacement applications, or applications  
where operation in dropout mode is expected, it is  
recommended that the CTRL pin voltage be derived  
from the LED cathode terminal.  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
7
Doc. No. MD-5025 Rev. E  
CAT4201  
SIMPLIFIED BLOCK DIAGRAM  
12V/24V  
VBAT  
30k  
CTRL  
7V  
20µA  
OFF-Time Control  
SW  
EN  
PWM  
Controller  
ON-Time Control  
1.2V  
Reference  
EN  
+
R
2
1ꢀ  
1.2V  
RSET  
GND  
Figure 1. CAT4201 Simplified Block Diagram  
BASIC OPERATION  
LED Pin Current  
The CAT4201 is a high efficiency step-down regulator  
designed to drive series connected high-power LEDs.  
LED strings with total forward voltages of up to 32V  
can be driven with bias currents of up to 350mA.  
The LED current is set by the external RSET resistor  
connected to the regulated output of the RSET pin. An  
overall current gain ratio of approximately 2.5A/mA  
exists between the average LED current and the  
RSET current, hence the following equation can be  
used to calculate the LED current.  
During the first switching phase, an integrated high  
voltage power MOSFET allows the inductor current to  
charge linearly until the peak maximum level is  
reached, at which point the MOSFET is switched off  
and the second phase commences, allowing the  
inductor current to then flow through the Schottky  
diode circuit and discharge linearly back to zero  
current.  
LED Current (A) 2.5 x VRSET (V) / RSET (k)  
Table 2 lists the various LED currents and the  
associated RSET resistors.  
LED current (A)  
RSET (k)  
0.10  
0.15  
0.20  
0.25  
0.30  
0.35  
33  
21  
The switching architecture ensures the device will  
always operate at the cross-over point between  
Continuous Conduction Mode (CCM) and Discon-  
tinuous Conduction Mode (DCM). This operating  
mode results in an average LED current which is  
equal to half of the peak switching current.  
15  
12  
10  
8.25  
Table 2. RSET Resistor Selection  
Doc. No. MD-5025 Rev. E  
8
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
CAT4201  
APPLICATION INFORMATION  
L
(µH)  
I rated  
(A)  
LED current  
(A)  
Input Voltage Range  
Part Number  
The minimum supply voltage required to maintain  
adequate regulation is set by the cathode terminal  
voltage of the LED string (i.e the VBAT voltage minus  
the LED string voltage). When the LED cathode  
terminal falls below 3V, a loss of regulation occurs.  
CDRH6D26-100  
CDRH6D26-220  
CDRH6D28-330  
CDRH6D28-470  
CDRH6D28-560  
10  
22  
33  
47  
56  
1.5  
1.0  
0.35  
0.35  
0.35  
0.35  
0.35  
0.92  
0.8  
For applications which may occasionally need to  
experience supply “dropout” conditions, it is  
recommended that the CTRL input be used to sense  
the LED cathode voltage. The CTRL pin can either be  
tied directly to the cathode terminal (for Lamp  
Replacement) or connected via a pass-transistor for  
PWM lighting applications.  
0.73  
Table 3. Sumida inductors  
Capacitor Selection  
A 10μF ceramic capacitor C2 across the LED(s)  
keeps the LED ripple current within ± 15% of nominal  
for most applications. If needed, a larger capacitor can  
be used to further reduce the LED current ripple. Any  
resistance in series with the LED (0.5Ω or more)  
contributes to reduce the ripple current. The capacitor  
voltage rating should be equivalent to the maximum  
expected supply voltage so as to allow for “Open-  
LED” fault conditions. The capacitor value is  
independent of the switching frequency or the overall  
efficiency.  
Figure 2 shows the regulation performance obtained  
in dropout, when the CTRL pin is configured to sense  
the LED cathode voltage.  
400  
300  
300mA  
A 4.7μF ceramic input capacitor C1 is recommended  
to minimize the input current ripple generated on the  
supply. Using a larger capacitor value further reduces  
the ripple noise appearing on the supply rail.  
200  
150mA  
100  
If  
a
constant capacitance is needed across  
temperature and voltage, X5R or X7R dielectric  
capacitors are recommended.  
0
0
1
2
3
4
5
6
Schottky Diode  
CTRL VOLTAGE [V]  
The peak repetitive current rating of the Schottky  
diode must be greater than the peak current flowing  
through the inductor. Also the continuous current  
rating of the Schottky must be greater than the  
average LED current. The voltage rating of the diode  
should be greater than the peak supply voltage  
transient preventing any breakdown or leakage.  
Central Semiconductor Schottky diode CMDSH05-4  
(40V, 500mA rated) is recommended. Schottky diodes  
rated at 400mA (or higher) continuous current are fine  
for most applications.  
Figure 2. “Dropout” configured LED Current  
(as shown in Typical Application on page 1)  
Inductor Selection  
For 350mA LED current drive levels, a 22µH inductor  
value is recommended to provide suitable switching  
frequency across a wide range of input supply values.  
For LED current of 150mA or less, a 33µH or 47µH  
inductor is more suitable.  
The inductor must have a maximum current rating  
which equals or exceeds twice the programmed LED  
current. For example, when driving LEDs at 350mA,  
an inductor with at least 700mA current rating must be  
used. Minor improvements in efficiency can be  
achieved by selecting inductors with lower series  
resistance.  
Note: Schottky diodes with extremelly low forward voltages (VF) are  
not recommended, as they may cause an increase in the  
LED current.  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
9
Doc. No. MD-5025 Rev. E  
CAT4201  
Dimming Methods  
VBAT  
12V  
Two methods for PWM dimming control on the LEDs  
are described below. The first method is to PWM on  
the control pin, the other method is to turn on and off a  
second resistor connected to the RSET pin and  
connected in parallel with R1.  
C1  
4.7µF  
D
C2  
VBAT  
CAT4201  
10µF  
RSET  
L
PWM on CTRL Pin  
R1  
10k  
SW  
CTRL  
A PWM signal from a microprocessor can be used for  
dimming the LEDs when tied to the CTRL pin. The  
duty cycle which is the ratio between the On time and  
the total cycle time sets the dimming factor. The  
recommended PWM frequency on the CTRL pin is  
between 100Hz and 2kHz.  
22µH  
R2  
GND  
Q1  
NPN  
PWM  
control  
R4  
1kꢀ  
5V  
0V  
1kꢀ  
R5  
47kꢀ  
Figure 5. Circuit for PWM on CTRL  
PWM on RSET Pin  
Another dimming method is to place in parallel to R1  
another resistor with a FET in series, as shown on  
Figure 6. R1 sets the minimum LED current corres-  
ponding to 0% duty cycle. The combined resistor of  
R1 and Rmax sets the maximum LED current  
corresponding to 100% duty cycle.  
VBAT  
13V  
4.7µF  
C1  
D
C2  
Figure 3. PWM at 1kHz on CTRL Pin  
VBAT  
CAT4201  
10µF  
RSET  
L
Rmax  
R1  
300  
250  
200  
150  
100  
50  
SW  
CTRL  
22µH  
R2  
GND  
Q1  
PWM  
control  
NPN  
1k  
OFF ON  
Figure 6. Circuit for PWM on RSET  
0
100  
80  
60  
40  
20  
0
DUTY CYCLE [%]  
Figure 4. LED Current vs. Duty Cycle  
Doc. No. MD-5025 Rev. E  
10  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
CAT4201  
Operation from high supply voltage above 14V  
Parallel configuration for driving LEDs beyond  
350mA  
For operation from a supply voltage above 14V, it is  
recommended to have a slew rate of 1µs or more for  
every 5V increase in VBAT supply. When using a high  
supply voltage of 24V, a 1or 2resistor in series  
with the supply, as shown on Figure 7, is  
recommended to limit the slew rate of the supply  
voltage. A 4.7µF minimum ceramic capacitor is placed  
between the VBAT pin and ground. The combination  
of the series resistor R3 and input capacitor C1 atcs  
as a low pass filter limiting the excessive in-rush  
currents and overvoltage transients which would  
otherwise occur during “hot-plug” conditions, thereby  
protecting the CAT4201 driver.  
Several CAT4201 devices can be connected in  
parallel for driving LEDs with current in excess of  
350mA. The CAT4201 driver circuits are connected to  
the same LED cathode. Figure  
9 shows the  
application schematic for driving 1A into one LED with  
three CAT4201 connected in parallel. Each CAT4201  
is driving the LED with a current set by its RSET  
resistor. The resulting LED current is equal to the sum  
of each driver current.  
R5  
VIN  
C1  
1  
C4  
10µF  
U1  
4.7µF  
D1  
VBAT  
VBAT R3  
1A  
CAT4201  
RSET  
24V  
1  
C1  
R1  
L1  
R4  
CTRL  
SW  
SW  
SW  
4.7µF  
8.3kꢀ  
D1  
22µH  
C2  
GND  
1kꢀ  
VBAT  
CAT4201  
4.7µF  
RSET  
R1  
L
300mA  
CTRL  
SW  
10kꢀ  
C2  
33µH  
GND  
U2  
4.7µF  
R1  
D2  
VBAT  
CAT4201  
RSET  
1kꢀ  
R2  
L2  
Figure 7. 24V Application with 5 LEDs  
CTRL  
8.3kꢀ  
22µH  
GND  
Operation from high supply voltage of 36V  
When powering from a high supply voltage of 36V, a  
2resistor in series with the supply is recommended,  
as shown on Figure 8, to limit the slew rate of the  
supply voltage.  
C3  
U3  
4.7µF  
D3  
VBAT  
CAT4201  
RSET  
VBAT R3  
R3  
L3  
36V  
2ꢀ  
C1  
CTRL  
8.3kꢀ  
22µH  
GND  
4.7µF  
D1  
C2  
VBAT  
CAT4201  
2.2µF  
RSET  
Figure 9. Three CAT4201 in Parallel for 1A LED  
R1  
L
300mA  
CTRL  
SW  
10kꢀ  
47µH  
GND  
R2  
1kꢀ  
Figure 8. 36V Application with 6 LEDs  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
11  
Doc. No. MD-5025 Rev. E  
CAT4201  
Open LED Behavior  
Board Layout  
If the LEDs are not connected, the CAT4201 stops  
switching and draws very little current.  
In order to minimize EMI and switching noise, the  
Schottky diode, the inductor and the output capacitor  
C2 should all be located close to the driver IC. The  
input capacitor C1 should be located close to the  
VBAT pin and the Schottky diode cathode. The  
CAT4201 ground pin should be connected directly to  
the ground plane on the PCB. A recommended PCB  
layout with component location is shown on Figure 11.  
The LEDs are connected by two wires tied to both  
sides of the output capacitor C2. The LEDs can be  
located away from the driver if needed.  
At power-up with no load connected, the capacitor C2  
is charged-up by the CAT4201. As soon as the bottom  
side of the capacitor (C2-) reaches 0 volt, as shown  
on Figure 10, the CAT4201 stops switching and  
remains in the idle mode only drawing about 0.4mA  
current from the supply.  
Figure 10. Open LED mode  
Figure 11. Recommended PCB Layout  
In order to further reduce the ripple on the supply rail,  
an optional Pi style filter (C-L-C) can be used. A 10µH  
inductor rated to the maximum supply current can be  
used.  
Doc. No. MD-5025 Rev. E  
12  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
CAT4201  
PACKAGE OUTLINE DRAWING  
TSOT-23 5-LEAD (TD)(1)(2)  
SYMBOL  
MIN  
NOM  
MAX  
1.00  
0.10  
0.90  
0.45  
0.20  
D
A
A1  
A2  
b
e
0.01  
0.80  
0.30  
0.12  
0.05  
0.87  
c
0.15  
D
2.90 BSC  
2.80 BSC  
1.60 BSC  
0.95TYP  
0.40  
E1  
E
E
E1  
e
L
0.30  
0º  
0.50  
8º  
L1  
L2  
θ
0.60 REF  
0.25 BSC  
TOP VIEW  
A2 A  
A1  
θ
L
b
c
L2  
L1  
SIDE VIEW  
END VIEW  
For current Tape and Reel information, download the PDF file from:  
http://www.catsemi.com/documents/tapeandreel.pdf.  
Notes:  
(1) All dimensions are in millimeters. Angles in degrees.  
(2) Complies with JEDEC standard MO-193.  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
13  
Doc. No. MD-5025 Rev. E  
CAT4201  
EXAMPLE OF ORDERING INFORMATION(1)  
Prefix  
Device #  
Suffix  
CAT  
4201  
TD  
-G  
T3  
Package  
TD: TSOT  
Plated Finish  
G: NiPdAu  
Tape & Reel  
T: Tape & Reel  
3: 3000/Reel  
Company ID  
Product Number  
4201  
ORDERING PART NUMBER  
CAT4201TD-GT3  
Notes:  
(1) All packages are RoHS-compliant (Lead-free, Halogen-free).  
(2) The standard plated finish is NiPdAu on all pins.  
(3) The device used in the above example is a CAT4201TD-GT3 (TSOT-23, NiPdAu, Tape & Reel).  
(4) For additional package and temperature options, please contact your nearest ON Semiconductor Sales office.  
Doc. No. MD-5025 Rev. E  
14  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
CAT4201  
REVISION HISTORY  
Date  
Revision Reason  
24-Jul-07  
A
B
Initial Issue  
Updated Typical Application Circuit  
Added “External Component Selection” Table  
Added “Capacitor Selection” information  
Updated Figures 5, 6, 7, 8  
02-Aug-07  
Update Description, change patent-pending to patented  
Update Package Outline Drawing  
21-Feb-08  
C
17-Jun-08  
17-Nov-08  
D
E
Update Supply Voltage  
Change logo and fine print to ON Semiconductor  
ON Semiconductor and  
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to  
any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability  
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.  
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All  
operating parameters, including “Typicals” must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights  
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications  
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer  
purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and  
distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated  
with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal  
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.  
PUBLICATION ORDERING INFORMATION  
LITERATURE FULFILLMENT:  
N. American Technical Support: 800-282-9855 Toll Free  
USA/Canada  
Europe, Middle East and Africa Technical Support:  
Phone: 421 33 790 2910  
Japan Customer Focus Center:  
Phone: 81-3-5773-3850  
ON Semiconductor Website: www.onsemi.com  
Literature Distribution Center for ON Semiconductor  
P.O. Box 5163, Denver, Colorado 80217 USA  
Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada  
Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada  
Email: orderlit@onsemi.com  
Order Literature: http://www.onsemi.com/orderlit  
For additional information, please contact your local  
Sales Representative  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
15  
Doc. No. MD-5025 Rev. E  

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