LTC3542-1_15 Datasheet, PDF (2/16 Pages) Linear Technology – 500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter

LTC3542-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V_IN) ........................... –0.3V to 6V
V_OUT, RUN Voltages......................................–0.3V to V_IN
MODE Voltage................................–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 7) ............................. 125°C
Storage Temperature Range................... –65°C to 150°C
Reflow Peak Body Temperature ............................ 260°C
PIN CONFIGURATION
TOP VIEW
V_OUT 1
6 RUN
V_IN 2
7
5 MODE/SYNC
GND 3
4 SW
DC PACKAGE
6-LEAD (2mm s 2mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 89°C/W, θ_JC = 18°C/W
(SOLDERED TO A 4-LAYER BOARD, NOTE 3)
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3542EDC-1#PBF
LTC3542EDC-1#TRPBF LDWC
6-Lead (2mm × 2mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l 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 noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_IN
R_VOUT
V_OUT
ΔV_{LINE_REG}
ΔV_{LOAD_REG}
I_S
Operating Voltage Range
Input Resistance of V_OUT Pin
Output Feedback Voltage (Note 4)
Reference Voltage Line Regulation (Note 4)
Output Voltage Load Regulation (Note 4)
Input DC Supply Current (Note 5)
Active Mode
Sleep Mode
Shutdown
V_IN = 2.5V to 5.5V
I_LOAD = 100mA to 500mA
V_OUT = 2.5V
V_OUT = 2.9V, MODE = 0V
RUN = 0V
l 2.5
5.5
V
504
840 1176
kΩ
l 2.744 2.8 2.856
V
0.04
0.2
%/V
0.02
0.2
%
300
500
μA
26
35
μA
0.1
1
μA
f_OSC
f_SYNC
I_LIM
R_DS(ON)
I_SW(LKG)
Oscillator Frequency
Synchronous Frequency
Peak Switch Current
P-Channel On Resistance (Note 6)
N-Channel On Resistance (Note 6)
Switch Leakage Current
V_OUT = 2.8V
l 1.8
2.25
2.7
MHz
V_OUT = 2.8V
1
3
MHz
V_IN = 3V, V_OUT = 2.5V, Duty Cycle < 35%
650 1000
mA
I_SW = 100mA
I_SW = –100mA
0.5
0.65
Ω
0.35 0.55
Ω
V_IN = 5V, V_RUN = 0V, V_SW = 0V or 5V
±0.01 ±1
μA
35421f
2