LTC3458 Datasheet, PDF (2/16 Pages) Linear Technology – 1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect

LTC3458
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN, SS, SYNC Voltages ................................. –0.3 to 7V
BURST, SHDN, V_OUT Voltages ....................... –0.3 to 8V
Operating Temperature Range
(Notes 2, 3) .........................................–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
SW Voltage
DC ........................................................... –0.3V to 8V
Pulsed <100ns ...................................... –0.3V to 10V
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SW 1
12 V_OUT
V_IN 2
11 BURST
SYNC 3
10 SS
13
SHDN 4
9 GND
I_LIM 5
R_T 6
8 COMP
7 FB
DE12 PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
EXPOSED PAD IS PGND (PIN 13),
MUST BE SOLDERED TO PCB
T_JMAX = 125°C, θ_JA = 45°C/W
ORDER PART
NUMBER
LTC3458EDE
DE PART MARKING
3458
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.3V, V_OUT = 5V, R_T = 200k, unless otherwise noted.
PARAMETER
Minimum V_IN Operating Voltage
Output Voltage Adjust Range
Feedback Voltage
Undervoltage (Exit Burst Mode Operation)
Feedback Input Current
Quiescent Current - Burst Mode Operation
Quiescent Current - Shutdown
Quiescent Current - Active
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
Fixed NMOS Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
Frequency Accuracy
Error Amplifier Transconductance
Error Amplifier Source Current
Error Amplifier Sink Current
SYNC Input High
SYNC Input Low
CONDITIONS
T_A = 0°C to 85°C
T_A = –40°C to 0°C
0°C to 85°C, V_OUT = 3.3V
–40°C to 0°C
Below Feedback Voltage
V_FB = 1.23V
V_IN Current at 3.3V
V_OUT Current at 5V
V_IN Current at 3.3V
V_OUT Current at 0V
V_IN Current Switching
V_OUT = 5V
V_OUT = 5V
R_ILIM = 124k
V_IN = 3.3V, f_OSC = 1MHz
R_T = 200k
MIN TYP MAX UNITS
1.4
1.5
V
1.4
1.7
V
● 2.0
7.5
V
1.21 1.23 1.25
V
1.20
1.25
V
–4%
V
1
50
nA
15
30
µA
5
10
µA
0.5
1
µA
1
3
µA
1
3
mA
●
0.05
5
µA
●
0.05
5
µA
0.3
Ω
0.4
Ω
● 1.4
1.6
A
● 80
90
%
●
0
%
● 0.85
1
1.15
MHz
100
µA/V
7
µA
7
µA
● 1.5
V
●
0.35
V
3458f
2