LTC3448_15 Datasheet, PDF (2/20 Pages) Linear Technology – 1.5MHz/2.25MHz, 600mA Synchronous Step-Down Regulator with LDO Mode

LTC3448
ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage .................................. – 0.3V to 6V
RUN, SYNC Voltages ................... – 0.3V to (V_IN + 0.3V)
MODE Voltage ............................. – 0.3V to (V_IN + 0.3V)
FREQ, V_FB Voltages...................... – 0.3V to (V_IN + 0.3V)
SW Voltage .................................. – 0.3V to (V_IN + 0.3V)
V_OUT Voltage ................................ – 0.3V to (V_IN + 0.3V)
P-Channel Switch Source Current (DC) ............. 800mA
N-Channel Switch Sink Current (DC) ................. 800mA
V_OUT (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
V_FB 1
8 RUN
V_OUT 2
9
7 SYNC
MODE 3
6 FREQ
V_IN 4
5 SW
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 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
V_FB 1
8 RUN
V_OUT 2
MODE 3
9
7 SYNC
6 FREQ
V_IN 4
5 SW
MS8E PACKAGE
8-LEAD PLASTIC MSOP
T_JMAX = 125°C, θ_JA = 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 T_A = 25°C. V_IN = 3.6V unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
I_VFB
V_FB
∆V_FB
∆V_OVL
∆V_OUT
I_PK
Feedback Current
Regulated Feedback Voltage
(Note 4)
Reference Voltage Line Regulation
Output Overvoltage Lockout
Output Voltage Line Regulation
Peak Inductor Current
T_A = 25°C
0°C ≤ T_A ≤ 85°C
–40°C ≤ T_A ≤ 85°C
V_IN = 2.5V to 5.5V (Note 4)
∆V_OVL = V_OVL – V_FB
∆V_OVL = (V_OVL – V_OUT) • 100/V_OUT
V_IN = 2.5V to 5.5V (LDO)
V_FB = 0.5V or V_OUT = 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
V_LOADREG
V_OUT(MAX)
V_IN
Output Voltage Load Regulation
Maximum Output Voltage
Input Voltage Range
LDO, 1mA to 10mA
(Note 9)
0.5
V_IN – 0.7 V_IN – 0.3
● 2.5
5.5
UNITS
nA
V
V
V
%/V
mV
%
%/V
A
%/V
V
V
3448f
2