LTC3407-4 Datasheet, PDF (2/16 Pages) Linear Technology – Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

LTC3407-4
ABSOLUTE AXI U RATI GS (Note 1)
V_IN Voltages.................................................– 0.3V to 6V
V_FB1, V_FB2 Voltages......................... – 0.3V to V_IN + 0.3V
RUN1, RUN2 Voltages ................................ –0.3V to V_IN
MODE/SYNC Voltage .................................. – 0.3V to V_IN
SW1, SW2 Voltage ......................... – 0.3V to V_IN + 0.3V
POR Voltage ................................................– 0.3V to 6V
UW U
PACKAGE/ORDER I FOR ATIO
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)
LTC3407-4EMSE only ...................................... 300°C
Reflow Peak Body Temperature ............................ 260°C
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
T_JMAX = 125°C, θ_JA = 45°C/W, θ_JC = 10°C/W
EXPOSED PAD (PIN 11) IS PGND, MUST BE CONNECTED TO GND
ORDER PART NUMBER
DD PART MARKING
LTC3407EDD-4
LCJD
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
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
T_JMAX = 125°C, θ_JA = 45°C/W, θ_JC = 10°C/W
EXPOSED PAD (PIN 11) IS PGND, MUST BE CONNECTED TO GND
ORDER PART NUMBER
LTC3407EMSE-4
MSE PART MARKING
LTCJC
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
V_IN
I_FB
V_FB
∆V_{LINE REG}
∆V_{LOAD REG}
I_S
f_OSC
f_SYNC
Operating Voltage Range
Feedback Pin Input Current
Feedback Voltage (Note 3)
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current (Note 4)
Active Mode
Sleep Mode
Shutdown
Oscillator Frequency
Synchronization Frequency
0°C ≤ T_A ≤ 85°C
–40°C ≤ T_A ≤ 85°C
V_IN = 2.5V to 5.5V (Note 3)
(Note 3)
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
V_FBX = 0.6V
● 2.5
5.5
●
30
0.588 0.6 0.612
● 0.585 0.6 0.612
0.3
0.5
0.5
700 950
40
60
0.1
1
● 1.8
2.25
2.7
2.25
I_LIM
R_DS(ON)
Peak Switch Current Limit
Top Switch On-Resistance
Bottom Switch On-Resistance
V_IN = 3V, V_FBX = 0.5V, Duty Cycle <35%
(Note 6)
(Note 6)
0.95
1.2
1.6
0.35 0.45
0.30 0.45
I_SW(LKG)
Switch Leakage Current
V_IN = 5V, V_RUN = 0V, V_FBX = 0V
0.01
1
UNITS
V
nA
V
V
%/V
%
µA
µA
µA
MHz
MHz
A
Ω
Ω
µA
34074f
2