LTC3409 Datasheet, PDF (2/16 Pages) Linear Technology – 600mA Low Vin Buck Regulator in 3mm x 3mm DFN

LTC3409
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage .................................. – 0.3V to 6V
RUN, V_FB, MODE, SYNC Voltages . – 0.3V to (V_IN + 0.3V)
SW Voltage ................................... – 0.3V to (V_IN + 0.3V)
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Note 3) ............................ 125°C
Storage Temperature Range ................ – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V_FB 1
8 SYNC
GND 2
7 RUN
9
V_IN 3
6 SW
V_IN 4
5 MODE
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
LTC3409EDD
DD PART MARKING
LBNM
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 = 2.2V unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
V_RUN
I_RUN
V_MODE
I_MODE
V_SYNCTH
I_SYNC
V_FB
I_VFB
∆V_OVL
∆V_FB
∆V_OUT
I_PK
RUN Threshold
RUN Leakage Current
MODE Threshold
MODE Leakage Current
SYNC Threshold
SYNC Leakage Current
Regulated Feedback Voltage
Feedback Current
∆V_FBOVL Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Line Regulation
Peak Inductor Current
(Note 4) T_A = 25°C
(Note 4) 0°C ≤ T_A ≤ 85°C
(Note 4) –40°C ≤ T_A ≤ 85°C
∆V_OVL = ∆V_FBOVL – V_FB (Note 6)
(Note 4)
I_OUT = 100mA, 1.6V < V_IN < 5.5V
V_IN = 2.2V, V_FB = 0.5V or V_OUT = 90%,
Duty Cycle < 35%
●
0.3
0.65
1.1
0.01
1
●
0.3
0.65
1.1
0.01
1
●
0.3
0.65
1.1
0.01
1
0.6007 0.6130 0.6252
0.5992 0.6130 0.6268
● 0.5977 0.6130 0.6283
±30
35
61
85
●
0.04
0.4
0.04
0.4
0.75
1
1.3
V_LOADREG
V_IN
I_S
f_OSC
Output Voltage Load Regulation
Input Voltage Range
Input DC Bias Current
Active Mode
Sleep Mode
Shutdown
Nominal Oscillator Frequency
SYNC TH SYNC Threshold
(Note 5)
V_OUT = 90%, I_LOAD = 0A
V_OUT = 103%, I_LOAD = 0A
V_RUN = 0V, V_IN = 5.5V
SYNC = GND
SYNC = V_IN
When SYNC Input is Toggling (Note 7)
0.5
● 1.6
5.5
350
475
65
120
0.1
5
● 0.9
1.7
2.1
● 1.8
2.6
3.0
0.63
SYNC f_MIN Minimum SYNC Pin Frequency
1
SYNC f_MAX Maximum SYNC Pin Frequency
3
SYNC PW Minimum SYNC Pulse Width
100
t_SS
Soft-Start Period
RUN↑
1
2
UNITS
V
µA
V
µA
V
µA
V
V
V
nA
mV
%/V
%/V
A
%
V
µA
µA
µA
MHz
MHz
V
MHz
MHz
ns
ms
3409f