Dual 150mA ULTRA LOW DROPOUT,
LOW NOISE REGULATOR
PRELIMINARY - June 15, 2000
SC1456
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1456 contains two low dropout linear regulators
that operate from a +2.5V to +6V input range and
deliver up to 150mA. PMOS pass transistors allow a
low 110碌A(chǔ) supply current per device to remain
independent of load, making these devices ideal for
battery operated portable equipment such as cellular
phones, cordless phones and personal digital
assistants.
Each device can be powered from a separate supply
voltage or the same supply voltage for maximum
flexibility. The output voltage of each device can be
preset or adjusted with an external resistor divider.
Other features include independant low powered
shutdown, short circuit protection, thermal shutdown
protection and reverse battery protection for each
regulator. The SC1456 comes in the tiny 10 lead MSOP
package.
FEATURES
鈥?/div>
Two guaranteed 150 mA outputs
鈥?/div>
Designed to operate with ceramic capacitors
鈥?/div>
Fixed or adjustable outputs
鈥?/div>
Very small external components
鈥?/div>
Low 75碌V
RMS
output noise
鈥?/div>
Very low supply currents
鈥?/div>
Thermal overload protection
鈥?/div>
Reverse battery protection
鈥?/div>
Individual low power shutdown
鈥?/div>
Surface mount packaging (10 pin MSOP)
鈥?/div>
Full industrial temperature range
APPLICATIONS
鈥?/div>
Battery Powered Systems
鈥?/div>
Cellular Telephones
鈥?/div>
Cordless Telephones
鈥?/div>
Personal Digital Assistants
鈥?/div>
Portable Instrumentation
鈥?/div>
Modems
鈥?/div>
PCMCIA cards
ORDERING INFORMATION
Part Number
SC1456XIMSTR
(1)(2)
Package
MSOP-10
Notes:
(1) Where X denotes voltage options - see table on page 4. Consult factory for other voltage options.
(2) Only available in tape and reel packaging. A reel contains 2500 devices.
TYPICAL APPLICATIONS
U1
VIN1
10
1
VIN2
(OR VIN1)
C1
1uF
C2
1uF
5
6
IN1
EN1
IN2
EN2
GND
2
GND
7
SC1456
OUT1
OUT2
SET1
SET2
9
4
3
8
C3
1uF
C4
1uF
VOUT1 = PRESET
VOUT2 = PRESET
Output Voltages Set Internally
U1
VIN1
10
1
VIN2
(OR VIN1)
C1
1uF
C2
1uF
5
6
IN1
EN1
IN2
EN2
GND
2
GND
7
R2
SC1456
OUT1
OUT2
SET1
SET2
9
4
3
R1
8
C3
2.2uF
C4
1uF
VOUT1 (SEE EQUATION)
VOUT2 = PRESET
R1
錚?/div>
錚?/div>
V
OUT1
=
1.250
鈥?錚?/div>
1
+
錚?/div>
R2
錚?/div>
錚?/div>
R 2
鈮?/div>
120 k
鈩?/div>
Output 1 Set Externally and Output 2 Set Internally
1
漏 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SC1456XIMSTR相關(guān)型號(hào)PDF文件下載
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