LTC3448 Просмотр технического описания (PDF) - Linear Technology
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LTC3448 Datasheet PDF : 20 Pages
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LTC3448
ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage .................................. – 0.3V to 6V
RUN, SYNC Voltages ................... – 0.3V to (VIN + 0.3V)
MODE Voltage ............................. – 0.3V to (VIN + 0.3V)
FREQ, VFB Voltages...................... – 0.3V to (VIN + 0.3V)
SW Voltage .................................. – 0.3V to (VIN + 0.3V)
VOUT Voltage ................................ – 0.3V to (VIN + 0.3V)
P-Channel Switch Source Current (DC) ............. 800mA
N-Channel Switch Sink Current (DC) ................. 800mA
VOUT (LDO) Source Current .................................. 25mA
Peak SW Sink and Source Current ........................ 1.3A
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Notes 3, 7) ...................... 125°C
Storage Temperature Range ................ – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
MSOP Only ...................................................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VFB 1
8 RUN
VOUT 2
9
7 SYNC
MODE 3
6 FREQ
VIN 4
5 SW
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/ W
EXPOSED PAD (PIN 9) IS GND
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
LTC3448EDD
DD PART MARKING
LBMJ
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
VFB 1
8 RUN
VOUT 2
MODE 3
9
7 SYNC
6 FREQ
VIN 4
5 SW
MS8E PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 40°C/ W
EXPOSED PAD (PIN 9) IS GND
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
LTC3448EMS8E
MS8 PART MARKING
LTBMK
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C. VIN = 3.6V unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
IVFB
VFB
∆VFB
∆VOVL
∆VOUT
IPK
Feedback Current
Regulated Feedback Voltage
(Note 4)
Reference Voltage Line Regulation
Output Overvoltage Lockout
Output Voltage Line Regulation
Peak Inductor Current
TA = 25°C
0°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 85°C
VIN = 2.5V to 5.5V (Note 4)
∆VOVL = VOVL – VFB
∆VOVL = (VOVL – VOUT) • 100/VOUT
VIN = 2.5V to 5.5V (LDO)
VFB = 0.5V or VOUT = 90%,
Duty Cycle < 35%
●
±30
0.5880 0.6 0.6120
0.5865 0.6 0.6135
● 0.5850 0.6 0.6150
●
0.2
0.4
15
35
55
2.5
5.8
9.2
0.1
0.8
0.7
1
1.3
VLOADREG
VOUT(MAX)
VIN
Output Voltage Load Regulation
Maximum Output Voltage
Input Voltage Range
LDO, 1mA to 10mA
(Note 9)
0.5
VIN – 0.7 VIN – 0.3
● 2.5
5.5
UNITS
nA
V
V
V
%/V
mV
%
%/V
A
%/V
V
V
3448f
2
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