LTC3407-2 Datasheet, PDF (2/16 Pages) Linear Technology – Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

LTC3407-2
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN Voltages.................................................– 0.3V to 6V
V_FB1, V_FB2, RUN1, RUN2
Voltages ..................................... – 0.3V to V_IN + 0.3V
MODE/SYNC Voltage ...................... – 0.3V to V_IN + 0.3V
SW1, SW2 Voltage ......................... – 0.3V to V_IN + 0.3V
POR Voltage ................................................– 0.3V to 6V
Ambient Operating Temperature
Range (Note 2) ................................... – 40°C to 85°C
Junction Temperature (Note 5) ............................. 125°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
LTC3407-2EMSE only ...................................... 300°C
Reflow Peak Body Temperature ............................ 260°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V_FB1 1
RUN1 2
V_IN 3
SW1 4
GND 5
10 V_FB2
9 RUN2
11
8 POR
7 SW2
6 MODE/
SYNC
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
DD PIN 11, EXPOSED PAD: PGND
MUST BE CONNECTED TO GND
T_JMAX = 125°C, θ_JA = 45°C/W, θ_JC = 10°C/W
ORDER PART
NUMBER
LTC3407EDD-2
DD PART MARKING
LBFB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
V_FB1 1
RUN1 2
10 V_FB2
9 RUN2
V_IN 3
11
8 POR
SW1 4
7 SW2
GND 5
6 ^MODE/
SYNC
MSE PACKAGE
10-LEAD PLASTIC MSOP
MSE PIN 11, EXPOSED PAD: PGND
MUST BE CONNECTED TO GND
T_JMAX = 125°C, θ_JA = 45°C/W, θ_JC = 10°C/W
ORDER PART
NUMBER
LTC3407EMSE-2
MSE PART MARKING
LTBDZ
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_IN
I_FB
V_FB
∆V_{LINE REG}
∆V_{LOAD REG}
I_S
f_OSC
f_SYNC
I_LIM
R_DS(ON)
Operating Voltage Range
Feedback Pin Input Current
Feedback Voltage (Note 3)
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current
Active Mode
Sleep Mode
Shutdown
Oscillator Frequency
Synchronization Frequency
Peak Switch Current Limit
Top Switch On-Resistance
Bottom Switch On-Resistance
0°C ≤ T_A ≤ 85°C
–40°C ≤ T_A ≤ 85°C
V_IN = 2.5V to 5.5V (Note 3)
(Note 3)
● 2.5
5.5
V
●
30
nA
0.588 0.6 0.612
V
● 0.585 0.6 0.612
V
0.3
0.5
%/V
0.5
%
V_FB1 = V_FB2 = 0.5V
V_FB1 = V_FB2 = 0.63V, MODE/SYNC = 3.6V
RUN = 0V, V_IN = 5.5V, MODE/SYNC = 0V
700 950
µA
40
60
µA
0.1
1
µA
V_FBX = 0.6V
● 1.8
2.25
2.7
MHz
2.25
MHz
V_IN = 3V, V_FBX = 0.5V, Duty Cycle <35%
(Note 6)
(Note 6)
0.95
1.2
1.6
A
0.35 0.45
Ω
0.30 0.45
Ω
I_SW(LKG)
Switch Leakage Current
V_IN = 5V, V_RUN = 0V, V_FBX = 0V
0.01
1
µA
2
sn34072 34072fs