ltc3405a Linear Technology Corporation, ltc3405a Datasheet - Page 2

• Manufacturer Part Number: ltc3405a
• Description: 1.5mhz, 300ma Synchronous Step-down Regulator In Thinsot
• Manufacturer: Linear Technology Corporation

ABSOLUTE AXI U RATI GS
LTC3405A
(Note 1)
Input Supply Voltage .................................. – 0.3V to 6V
MODE, RUN, V
SW Voltage .................................. – 0.3V to (V
P-Channel Switch Source Current (DC) ............. 400mA
N-Channel Switch Sink Current (DC) ................. 400mA
Peak SW Sink and Source Current .................... 630mA
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Note 3) ............................ 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
The
V
SYMBOL
I
I
V
∆V
∆V
V
V
I
f
R
R
I
V
I
V
I
Burst Mode is a registered trademark of Linear Technology Corporation.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3405AE 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.
ELECTRICAL CHARACTERISTICS
2
VFB
PK
S
OSC
LSW
RUN
MODE
FB
LOADREG
IN
RUN
MODE
IN
PFET
NFET
OVL
FB
= 3.6V unless otherwise specified.
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
PARAMETER
Feedback Current
Peak Inductor Current
Regulated Feedback Voltage
∆Output Overvoltage Lockout
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input Voltage Range
Input DC Bias Current
Oscillator Frequency
R
R
SW Leakage
RUN Threshold
RUN Leakage Current
MODE Threshold
MODE Leakage Current
DS(ON)
DS(ON)
Pulse Skipping Mode
Burst Mode
Shutdown
FB
of P-Channel FET
of N-Channel FET
Voltages ......................... – 0.3V to V
W
®
Operation
W W
CONDITIONS
V
(Note 4)
∆V
V
(Note 5)
V
V
V
V
V
I
I
V
SW
SW
IN
IN
FB
FB
RUN
FB
FB
RUN
OVL
= 3V, V
= 2.5V to 5.5V (Note 4)
= 0.7V, Mode = 3.6V, I
= 0.83V, Mode = 0V, I
= 0.8V
= 0V
= 100mA
= –100mA
U
= 0V, V
= 0V, V
= V
IN
OVL
FB
+ 0.3V)
IN
SW
= 0.7V, Duty Cycle < 35%
– V
= 4.2V
= 0V or 5V, V
FB
IN
PACKAGE/ORDER I FOR ATIO
LOAD
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Note 3: T
dissipation P
Note 4: The LTC3405A is tested in a proprietary test mode that connects
V
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
LOAD
FB
IN
LTC3405A: T
to the output of the error amplifier.
= 0A
= 0A
= 5V
RUN 1
GND 2
SW 3
J
T
JMAX
6-LEAD PLASTIC TSOT-23
is calculated from the ambient temperature T
D
= 125°C, θ
according to the following formula:
S6 PACKAGE
J
TOP VIEW
= T
A
JA
+ (P
= 250°C/ W
D
●
●
●
●
●
●
●
●
●
●
)(250°C/W)
6 MODE
5 V
4 V
FB
IN
0.784
MIN
375
2.5
1.2
0.3
0.3
20
U
±0.01
±0.01
±0.01
S6 PART MARKING
0.04
TYP
500
300
210
0.8
0.1
1.5
0.7
0.6
1.5
50
20
0.5
1
LTC3405AES6
ORDER PART
A
NUMBER
W
= 25°C.
LTZW
A
0.816
MAX
0.85
0.90
±30
625
400
0.4
5.5
1.8
1.5
±1
±1
±1
and power
80
35
1
2
UNITS
3405afa
U
MHz
%/V
kHz
mA
mV
nA
µA
µA
µA
µA
µA
µA
%
Ω
Ω
V
V
V
V