LTC3442 Datasheet, PDF (2/20 Pages) Linear Integrated Systems – Micropower Synchronous Buck-Boost DC/DC Converter with Automatic Burst Mode Operation

LTC3442
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN, V_OUT Voltage........................................... – 0.3 to 6V
SW1, SW2 Voltage
DC ................................................................. – 0.3 to 6V
Pulsed <100ns ............................................... – 0.3 to 7V
SHDN/SS, BURST Voltage ............................. – 0.3 to 6V
Operating Temperature (Note 2) ............. – 40°C to 85°C
Maximum Junction Temperature (Note 4) ............ 125°C
Storage Temperature Range ................. – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SHDN/SS 1
RT 2
SGND 3
SW1 4
PGND 5
SW2 6
12 FB
11 V_C
10 R_LIM
13
9 V_IN
8 V_OUT
7 BURST
DE12 PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
T_JMAX = 125°C
θ_JA = 53°C/W 1-Layer Board
θ_JA = 43°C/W 4-Layer Board
θ_JC = 4.3°C/W
EXPOSED PAD IS PGND (PIN 13)
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
LTC3442EDE
DE PART
MARKING
3442
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = V_OUT = 3.6V, R_T = 64.9k, unless otherwise noted.
PARAMETER
Input Start-Up Voltage
Output Voltage Adjust Range
Feedback Voltage
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
Input Current Limit
Reverse Current Limit
Burst Mode Operation Current Limit
Max Duty Cycle
Min Duty Cycle
Frequency Accuracy
Error Amp A_VOL
Error Amp Source Current
Error Amp Sink Current
Burst Threshold (Falling)
Burst Threshold (Rising)
CONDITIONS
MIN TYP MAX UNITS
●
2.3
2.4
V
● 2.4
5.25
V
● 1.19 1.22 1.25
V
V_FB = 1.22V
V_FB = 1.22V, BURST = 0V (Note 3)
SHDN = 0V, V_OUT = 0V, Not Including Switch Leakage
BURST = V_IN (Note 3)
Switches B and C
1
50
nA
35
60
µA
0.1
1
µA
600 1100
µA
0.1
2
µA
Switches A and D
0.1
3
µA
Switches B and C
0.10
Ω
Switches A and D
0.10
Ω
●2
3
A
0.5
A
0.9
A
Boost (% Switch C On)
Buck (% Switch A In)
● 70
88
%
● 100
%
●
0
%
● 570
670
770
kHz
90
dB
11
µA
300
µA
0.88
V
1.12
V
3442f
2