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SC1541CM-3.3.TRT [SEMTECH]

Fixed Positive LDO Regulator, 3.3V, 1.3V Dropout, BIPolar, PSSO5, HALOGEN FREE AND ROHS COMPLIANT, TO-263, 5 PIN;
SC1541CM-3.3.TRT
型号： SC1541CM-3.3.TRT
厂家： SEMTECH CORPORATION    SEMTECH CORPORATION
描述：

Fixed Positive LDO Regulator, 3.3V, 1.3V Dropout, BIPolar, PSSO5, HALOGEN FREE AND ROHS COMPLIANT, TO-263, 5 PIN

输出元件 调节器
文件： 总6页 (文件大小：155K)
中文：  中文翻译
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SC1541  
1.0A Low Dropout Voltage  
Regulator with Enable  
POWER MANAGEMENT  
Description  
Features  
The SC1541 is a high performance low dropout positive  
voltage regulator designed for use in applications where  
power management is critical, such as battery powered  
systems.  
‹ Low dropout performance, 1.3V max  
‹ Full current rating over line and temperature  
‹ Fast transient response  
‹ +2% total output regulation over line, load  
and temperature  
‹ 10µA max. quiescent current in shutdown  
‹ Three fixed output voltages  
‹ Line regulation 0.2% max.  
‹ Load regulation 0.4% max.  
‹ SO-8 and TO-263 packages  
Additionally, the SC1541 provides excellent regulation  
over variations in line, load and temperature.  
Outstanding features include low dropout performance  
at rated current, fast transient response, internal  
current limiting and thermal shutdown protection of the  
output device. A very low quiescent current of 10µA in  
shutdown mode reduces power dissipation.  
Applications  
‹ Low voltage microcontrollers  
‹ Switching power supply post-regulation  
‹ Instantly available circuits  
‹ Motherboards  
The SC1541 is available with three different voltage  
options as standard and two package options, SO-8 and  
5-lead TO-263.  
‹ Battery operated equipment  
Typical Application Circuit  
U1  
IN  
SC1541  
OUT  
VIN  
VOUT  
ENABLE SIGNAL  
EN  
GND  
C1  
C2  
10uF  
10uF min.  
Tantalum  
Tantalum  
Notes:  
(1) Input and output capacitors should be located close to the device.  
(2) Connect all pins to PCB (SO-8 package) for optimal thermal characteristics.  
(3) Increasing the output capacitor value will improve the overall transient response.  
(4) The device is enabled when VEN = VIN, and shut down when EN is pulled to ground. EN should not be taken higher  
than VIN. A CMOS signal referenced to VIN would be ideal for switching the SC1541 on and off.  
Revision: November 25, 2009  
1
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SC1541  
POWER MANAGEMENT  
Absolute Maximum Ratings  
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters  
specified in the Electrical Characteristics section is not implied.  
Parameter  
Symbol  
VIN, VEN  
PD  
Maximum  
7
Units  
V
Maximum Input Pin Voltage  
Power Dissipation  
Internally Limited  
W
Thermal Resistance Junction to Case  
SO-8  
39  
3
°C/W  
°C/W  
θJC  
TO-263  
Thermal Resistance Junction to Ambient  
SO-8(1)  
TO-263  
65  
60  
θJA  
Operating Junction Temperature Range  
Storage Temperature Range  
Lead Temperature (Soldering) 10 Sec  
Note:  
TJ  
0 to 125  
-65 to 150  
300  
°C  
°C  
°C  
TSTG  
TLEAD  
(1) 1 inch square of 1/16” FR-4, double sided, 1 oz. minimum copper weight.  
Electrical Characteristics  
Unless otherwise specified: IO = 0mA to 1A, VEN = VIN, 1.8V Option: VIN = 3.2V to 7.0V, 2.5 Option: VIN = 3.9V to 7.0V,  
3.3V Option: VIN = 4.7V to 7.0V. Values in bold apply over full operating temperature range.  
Parameter  
Output Voltage (1)  
Symbol  
Min  
-1  
Typ  
Max  
+1  
Units  
VOUT  
VIN = 5V, IOUT = 0mA  
VOUT  
%
-2  
+2  
Line Regulation(1)  
Load Regulation(1)  
Dropout Voltage(1)(2)  
Current Limit(1)  
REG(LINE)  
IOUT = 10mA  
VIN = 5V  
0.035  
0.2  
0.2  
0.4  
1.30  
%
%
REG(LOAD)  
VD  
ICL  
IQ  
IOUT = 1A  
1.10  
V
1.1  
A
Quiescent Current  
VIN = VEN = 5V  
5
6
7
10  
8
mA  
VIN = 5V, VEN < 0.25V  
µA  
V
10  
Enable Pin Control Voltage  
Enable Pin Current  
VEN  
Device OFF  
Device ON  
0.25  
0.45  
(VOUT + 0.5) (VOUT + 0.8)  
IEN  
VEN = 0V, VIN = 5V (OFF)  
0.1  
15  
1.0  
25  
µA  
V
EN = VIN = 5V (ON)  
2004 Semtech Corp.  
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SC1541  
PRELIMINARY  
POWER MANAGEMENT  
Electrical Characteristics (Cont.)  
Unless otherwise specified: IO = 0mA to 1A, VEN = VIN, 1.8V Option: VIN = 3.2V to 7.0V, 2.5 Option: VIN = 3.9V to 7.0V,  
3.3V Option: VIN = 4.7V to 7.0V. Values in bold apply over full operating temperature range.  
Parameter  
Symbol  
Min  
Typ  
0.005  
0.5  
Max  
Units  
%/C  
%
Temperature Coefficient  
Temperature Stability  
RMS Output Noise(3)  
Ripple Rejection Ratio(4)  
TC  
TS  
VN  
RA  
0.003  
72  
%VOUT  
dB  
VIN = 5V  
60  
Notes:  
(1) Low duty cycle pulse testing with Kelvin connections required.  
(2) ∆VOUT, ∆VREF = 1%.  
(3) Bandwidth of 10 Hz to 10kHz.  
(4) 120Hz input ripple.  
(5) This device is ESD sensitive. Use of standard ESD handling precautions is required.  
2004 Semtech Corp.  
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SC1541  
POWER MANAGEMENT  
Pin Configurations  
Ordering Information  
Device(1)(2)  
Package  
SC1541CM-X.X.TR  
SC1541CM-X.X.TRT(3)  
SC1541CS-X.X.TR  
SC1541CS-X.X.TRT(3)  
TO-263-5  
SO-8  
Notes:  
SO-8  
(1) Where X.X denotes voltage options. Available  
voltages are: 1.8V, 2.5V and 3.3V. Contact factory for  
additional voltage options.  
TO-263-5  
PIN FUNCTION  
(2) Only available in tape and reel packaging. A reel  
contains 800 (TO-263-5) or 2500 (SO-8) devices.  
(3) Halogen Free, and RoHS/WEEE compliant.  
1
EN  
GND  
OUT  
IN  
2
3/TAB  
4
Block Diagram  
5
NC  
Pin Descriptions  
Pin Name SO-8 Pin # TO-263-5 Pin # Pin Function  
EN  
GND  
NC  
1
1
Active high enable for the regulator output. Connect to VIN if not being used.  
Ground pin. Bottom end of the internal feedback resistor chain.  
No connection.  
2
2
5
4
3
IN  
4
This is the input supply pin for the device.  
OUT  
5, 6, 7, 8  
3/TAB  
This is the power output of the device. This pin is electrically connected to  
the tab of the TO-263-5 package.  
2004 Semtech Corp.  
4
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SC1541  
POWER MANAGEMENT  
Outline Drawing - SO-8  
DIMENSIONS  
INCHES MILLIMETERS  
A
DIM  
A
MIN NOM MAX MIN NOM MAX  
D
E
e
-
-
-
-
-
-
-
-
-
-
.053  
.069 1.35  
.010 0.10  
.065 1.25  
.020 0.31  
.010 0.17  
1.75  
0.25  
1.65  
0.51  
0.25  
N
A1 .004  
A2 .049  
2X E/2  
b
c
D
.012  
.007  
.189 .193 .197 4.80 4.90 5.00  
E1  
E1 .150 .154 .157 3.80 3.90 4.00  
E
e
.236 BSC  
.050 BSC  
6.00 BSC  
1.27 BSC  
1
2
-
-
h
L
.010  
.020 0.25  
0.50  
ccc  
C
.016 .028 .041 0.40 0.72 1.04  
2X N/2 TIPS  
(.041)  
(1.04)  
8
-
e/2  
L1  
N
8
B
-
01  
aaa  
0°  
8°  
0°  
8°  
.004  
.010  
.008  
0.10  
0.25  
0.20  
bbb  
ccc  
D
aaa  
C
h
A2  
A
D
SEATING  
PLANE  
h
C
A1  
H
bxN  
bbb  
C
A-B  
c
GAGE  
PLANE  
0.25  
L
(L1)  
01  
SEE DETAIL A  
DETAIL A  
SIDE VIEW  
NOTES:  
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).  
2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H-  
3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS  
OR GATE BURRS.  
4. REFERENCE JEDEC STD MS-012, VARIATION AA.  
Land Pattern - SO-8(1)  
X
DIMENSIONS  
DIM  
INCHES  
MILLIMETERS  
(.205)  
.118  
.050  
.024  
.087  
.291  
(5.20)  
3.00  
1.27  
0.60  
2.20  
7.40  
C
G
P
X
Y
Z
(C)  
G
Y
Z
P
NOTES:  
1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.  
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR  
COMPANY'S MANUFACTURING GUIDELINES ARE MET.  
2. REFERENCE IPC-SM-782A, RLP NO. 300A.  
Note:  
(1) More copper area should be used to lower RTH(J-A) as needed.  
2004 Semtech Corp.  
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SC1541  
POWER MANAGEMENT  
Outline Drawing - TO-263-5  
A
E
DIMENSIONS  
INCHES MILLIMETERS  
E/2  
DIM  
A
MIN NOM MAX MIN NOM MAX  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
.160  
.190 4.06  
.010 0.00  
.039 0.51  
.029 0.38  
.065 1.14  
.380 8.28  
4.83  
0.25  
0.99  
0.74  
1.65  
9.65  
-
0
L1  
D
A1 .000  
b
.020  
.015  
c1 .045  
c
D
.326  
D1 .270  
.380  
H
-
6.86  
.420 9.65  
1
2 3 4 5  
E
10.67  
-
-
E1 .245  
6.22  
H
.575  
.625 14.61  
15.88  
e
.067 BSC  
1.70 BSC  
-
-
-
-
L
L1  
N
.070  
-
.110 1.78  
2.79  
1.68  
-
.066  
e
5
15°  
-
5
15°  
-
-
0°  
-
8°  
-
0°  
-
8°  
0
01  
aaa  
b X N  
aaa  
B A  
.010  
0.25  
A
SEATING  
PLANE  
A1  
B
c1  
SIDE VIEW  
SEE DETAIL A  
PLATED COPPER  
HEAT SPREADER  
D1  
(L1)  
c
E1  
L
01  
NOTES:  
DETAIL A  
1. CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES).  
2. DIMENSIONS "D" AND "E" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS  
OR GATE BURRS.  
Land Pattern - TO-263-5(1)  
H
DIMENSIONS  
DIM  
INCHES  
MILLIMETERS  
G
H
.125  
.420  
.360  
.067  
.042  
.140  
.625  
3.18  
10.67  
K
9.14  
1.70  
1.07  
K
P
X
Y
Z
3.56  
15.88  
Z
G
Y
P
X
NOTES:  
1. CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES).  
2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY  
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR  
COMPANY'S MANUFACTURING GUIDELINES ARE MET.  
Note:  
(1) More copper area should be used to lower RTH(J-A) as needed.  
Contact Information  
Semtech Corporation  
Power Management Products Division  
200 Flynn Road, Camarillo, CA 93012  
Phone: (805)498-2111 FAX (805)498-3804  
2004 Semtech Corp.  
6
www.semtech.com  

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