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SC1552CM-2.5TRT [SEMTECH]

Fixed Positive LDO Regulator, 2.5V, 1.4V Dropout, PSSO5, TO-263, 5 PIN;
SC1552CM-2.5TRT
型号： SC1552CM-2.5TRT
厂家： SEMTECH CORPORATION    SEMTECH CORPORATION
描述：

Fixed Positive LDO Regulator, 2.5V, 1.4V Dropout, PSSO5, TO-263, 5 PIN

输出元件 调节器
文件： 总6页 (文件大小：92K)
中文：  中文翻译
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SC1552  
3 Amp Low Dropout  
Regulator With Reset And Enable  
PRELIMINARY  
POWER MANAGEMENT  
Description  
ꢀeatures  
The SC1552 high performance positive voltage  
regulator is designed for use in applications requiring low  
dropout performance at up to 3A. Additionally, the  
SC1552 provides excellent regulation over variations in  
line, load and temperature.  
u Low dropout voltage: 1.4V maximum  
u ꢀull current rating over line and temperature  
u ꢀast transient response  
u ±3% total output regulation over line, load and  
temperature  
u Active high enable input  
Similar to Semtech’s popular EZ1085, the SC1552  
includes extra features for maximum flexibility - a low  
power shutdown mode and a power-on reset output. The  
active high enable pin, when pulled low, shuts the  
regulator down so that it draws less than 10µA from the  
input supply. The power-on reset output remains asserted  
low until 175ms (typical) after the output voltage rises  
above the reset threshold. When the output drops  
below the reset threshold, reset asserts low within 20µs  
(typical).  
u Power-on reset output with 175ms (typical) delay  
u Line regulation typically 0.015%  
u Load regulation typically 0.05%  
u TO-263-5 surface mount package  
Applications  
u Microcontroller power supplies  
u Battery chargers  
u Post regulators  
u Battery chargers  
Outstanding features include low dropout performance  
at rated current, fast transient response, internal  
current limiting and thermal shutdown protection of the  
output device.  
The SC1552 is available with two standard output  
voltage options, 2.5V and 3.3V. It comes in the popular  
5 pin TO-263 surface mount package.  
Typical Application Circuit  
U1  
IN  
SC1552CM-3.3  
4
2
1
VIN = 5V  
ENABLE  
VOUT = 3.3V  
OUT  
5
RESET SIGNAL OUT  
EN  
RST  
GND  
3
TAB  
+
+
C1  
22uF  
C2  
47uF  
Revision 2, October 2001  
1
www.semtech.com  
SC1552  
POWER MANAGEMENT  
PRELIMINARY  
Absolute Maximum Ratings  
Parameter  
Symbol  
VIN, VEN  
PD  
Maximum  
Units  
V
Maximum Input Pin Voltage  
7
Internally Limited  
60  
Power Dissipation  
W
Thermal Impedance Junction to Ambient  
Thermal Impedance Junction to Case  
Operating Ambient Temperature Range  
Operating Junction Temperature Range  
Storage Temperature Range  
°C/W  
°C/W  
°C  
θJA  
3
θJC  
TA  
0 to +70  
0 to +125  
-65 to +150  
300  
TJ  
°C  
TSTG  
TLEAD  
°C  
Lead Temperature (Soldering) 10 Seconds  
°C  
Electrical Characteristics  
Unless specified: 3.9V ≤ VIN ≤ 7.0V (2.5V option, 4.7V ≤ VIN ≤ 7.0V for the 3.3V option), VEN = VIN, 0A ≤ IOUT ≤ 3A, TA = 25°C.  
Values in bold apply over full operating temperature range.  
Parameter  
Symbol  
Test Conditions  
Min  
Typ  
Max Units  
IN  
Supply Voltage (2.5V option)  
Supply Voltage (3.3V option)  
Supply Current  
VIN  
VIN  
3.9  
4.7  
7.0  
7.0  
20  
25  
10  
15  
V
V
I
15  
5
mA  
IN  
Off State Supply Current  
I
VEN = 0V  
µA  
IN(OFF)  
OUT  
Output Voltage(1)  
VOUT  
REGLINE  
REGLOAD  
VD  
VIN = 5V, IOUT = 0mA  
VIN = (VOUT(NOM) + 1.4V) to 7V, IOUT = 0mA  
VIN = 5V, IOUT = 0A to 3A  
IOUT = 3A  
-1%  
VOUT  
+1%  
V
%
%
V
-3%  
+3%  
Line Regulation(1)  
Load Regulation(1)  
Dropout Voltage(1)(2)  
0.015 0.100  
0.150  
0.05  
1.3  
0.20  
0.30  
1.4  
2001 Semtech Corp.  
2
www.semtech.com  
SC1552  
POWER MANAGEMENT  
PRELIMINARY  
Electrical Characteristics (Cont.)  
Unless specified: 3.9V ≤ VIN ≤ 7.0V (2.5V option, 4.7V ≤ VIN ≤ 7.0V for the 3.3V option), VEN = VIN, 0A ≤ IOUT ≤ 3A, TA = 25°C.  
Values in bold apply over full operating temperature range.  
Parameter  
Symbol  
Test Conditions  
Min  
Typ  
Max  
Units  
OUT (Cont.)  
Current Limit(1)  
ICL  
TC  
TS  
en  
3.0  
4.5  
0.005  
0.5  
A
%/°C  
%
Temperature Coefficient  
Temperature Stability  
RMS Output Noise  
Ripple Rejection Ratio  
EN  
VIN = 5V, IOUT = 0.5A  
f = 10Hz to 10kHz  
VIN = 5V, f = 120Hz  
0.003  
72  
%VOUT  
dB  
RA  
60  
Enable Pin Control Voltage  
VEN  
Device OFF  
Device ON  
0.4  
V
1.6  
Enable Pin Current  
IEN  
VEN = 0V, VIN = 5V (OFF)  
0.15  
35  
1.00  
100  
µA  
V
EN = VIN = 5V (ON)  
RST  
Reset Threshold  
VTH  
VOUT falling  
VOUT rising  
VOUT falling  
VOUT rising  
93  
94  
%VOUT  
(3)  
Reset Delay  
tDLY(LO)  
tDLY(HI)  
VOL  
20  
µs  
ms  
V
140  
175  
0.1  
560  
0.2  
Reset Output Voltage  
V
OUT ≤ VTH, IRST = -1.2mA  
VOH  
VOUT = VOUT(NOM), IRST = 500µA  
0.8VIN  
V
OVER TEMPERATURE PROTECTION  
High Trip Level  
Hysteresis  
THI  
170  
10  
°C  
°C  
THYST  
Notes:  
(1) Low duty cycle pulse testing with Kelvin connections required.  
(2) ∆VOUT, ∆VREꢀ = 1%.  
(3) Reset delay is measured from (VOUT = VTH) to (VRST = 50%) - see Timing Diagram on page 4.  
2001 Semtech Corp.  
3
www.semtech.com  
SC1552  
POWER MANAGEMENT  
PRELIMINARY  
Timing Diagram  
Block Diagram  
2001 Semtech Corp.  
4
www.semtech.com  
SC1552  
POWER MANAGEMENT  
PRELIMINARY  
Pin Configurations  
Ordering Information  
Part Number(1)(2)  
Package  
Top View  
Pin Function  
SC1552CM-X.XTR  
TO-263-5  
1
EN  
IN  
Notes:  
(1) Where X.X denotes voltage options. Available  
voltages are: 2.5V and 3.3V. Contact factory for  
additional voltage options.  
2
3/TAB  
4
GND  
OUT  
RST  
(2) Only available in tape and reel packaging. A reel  
contains 800 devices.  
5
TO-263-5  
Pin Descriptions  
Pin Pin Name Pin Function  
1
EN  
Active high enable pin. Pulling this pin high will enable the output. While the device will be turned off if  
this pin is left open, it is recommended to pull it low to turn the device off for noise immunity. Connect to  
IN if not being used.  
2
3
4
5
IN  
Input supply pin.  
GND  
OUT  
RST  
Ground pin. Electrically connected to the device tab.  
Regulated output pin, sourcing up to 1.5A.  
Reset pin. Remains low while VOUT is below the reset threshold, and for 175ms (typical) after V rises  
above the threshold. When VOUT drops below the threshold, RST pulls low within 20µs (typical).OUT  
Marking Information  
Top View  
v.v = Voltage Option (Example: 2.5)  
yyww = Datecode (Example: 0015)  
xxxx = Semtech Lot No. (Example: 00101)  
2001 Semtech Corp.  
5
www.semtech.com  
SC1552  
POWER MANAGEMENT  
PRELIMINARY  
Outline Drawing - TO-263-5  
Minimum Land Pattern - TO-263-5  
Contact Information  
Semtech Corporation  
Power Management Products Division  
652 Mitchell Rd., Newbury Park, CA 91320  
Phone: (805)498-2111 ꢀAX (805)498-3804  
2001 Semtech Corp.  
6
www.semtech.com  

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