LTC3406-1.2 Datasheet, PDF (2/12 Pages) Linear Technology – 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT

LTC3406-1.2
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage .................................. – 0.3V to 6V
RUN, V_OUT Voltages................................... – 0.3V to V_IN
SW Voltage (DC) ......................... – 0.3V to (V_IN + 0.3V)
P-Channel Switch Source Current (DC) ............. 800mA
N-Channel Switch Sink Current (DC) ................. 800mA
Peak SW Sink and Source Current (V_IN = 3V)........ 1.3A
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Notes 3, 5) ...................... 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RUN 1
GND 2
SW 3
5 V_OUT
4 V_IN
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T_JMAX = 125°C, θ_JA = 250°C/ W, θ_JC = 90°C/ W
ORDER PART
NUMBER
LTC3406ES5-1.2
S5 PART MARKING
LTBMQ
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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
UNITS
V_OUT
∆V_OVL
∆V_OUT
I_PK
V_LOADREG
V_IN
I_S
f_OSC
Regulated Output Voltage
Output Overvoltage Lockout
Output Voltage Line Regulation
Peak Inductor Current
Output Voltage Load Regulation
Input Voltage Range
Input DC Bias Current
Active Mode
Sleep Mode
Shutdown
Oscillator Frequency
R_PFET
R_NFET
I_LSW
V_RUN
I_RUN
R_DS(ON) of P-Channel FET
R_DS(ON) of N-Channel FET
SW Leakage
RUN Threshold
RUN Leakage Current
I_OUT = 100mA
∆V_OVL = V_OVL – V_OUT
V_IN = 2.5V to 5.5V
V_IN = 3V, V_OUT = 1.08V, Duty Cycle < 35%
(Note 4)
V_OUT = 1.08V, I_LOAD = 0A
V_OUT = 1.236V, I_LOAD = 0A
V_RUN = 0V, V_IN = 5.5V
V_OUT = 1.2V
V_OUT = 0V
I_SW = 100mA
I_SW = –100mA
V_RUN = 0V, V_SW = 0V or 5V, V_IN = 5V
● 1.164 1.2 1.236
V
2.5
6.25
10
%
●
0.04
0.4
%/V
0.75
1
1.25
A
0.5
%
● 2.5
5.5
V
300 400
µA
20
35
µA
0.1
1
µA
● 1.2
1.5
1.8
MHz
210
kHz
0.4
0.5
Ω
0.35 0.45
Ω
±0.01 ±1
µA
● 0.3
1
1.5
V
●
±0.01 ±1
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3406E-1.2 is guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: T_J is calculated from the ambient temperature T_A and power
dissipation P_D according to the following formula:
LTC3406-1.2: T_J = T_A + (P_D)(250°C/W)
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
340612f
2