LTC3532 LINER [Linear Technology], LTC3532 Datasheet - Page 3

• Manufacturer Part Number: LTC3532
• Description: Micropower Synchronous Buck-Boost DC/DC Converter
• Manufacturer: LINER [Linear Technology]

PARAMETER
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
Input Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
Frequency Accuracy
Burst Threshold (Falling)
Burst Threshold (Rising)
Burst Current Ratio
Error Amp AVOL
Error Amp Source Current
Error Amp Sink Current
SHDN/SS Threshold
SHDN/SS Input Current
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3532E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlations
with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
100
90
80
70
60
50
40
0.1
Effi ciency and Power Loss
vs Load Autoburst Mode
V
OUT
= 3.3V
1
LOAD CURRENT (mA)
EFFICIENCY
POWER LOSS
10
100
W
3V
3.6V
4.2V
3532 G01
1000
U
1000
100
10
1
0.1
0.01
CONDITIONS
Switches A and D
Switches B and C
Switches A and D
Boost (% Switch C On)
Buck (% Switch A On)
Ratio of I
V
V
When IC is Enabled
When EA is at Maximum Boost Duty Cycle
V
C
C
SHDN
= 1.4V
= 2V
= 5.5V
100
OUT
90
80
70
60
50
40
0.1
A
Effi ciency and Power Loss
vs Load
to I
BURST EFFICIENCY
POWER LOSS
= 25°C. V
BURST
BURST
The
1
LOAD CURRENT (mA)
●
IN
FIXED FREQUENCY
EFFICIENCY
denotes the specifi cations which apply over the full operating
= V
10
OUT
Note 3: Current measurements are performed when the outputs are not
switching.
Note 4: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
FIXED FREQUENCY
POWER LOSS
= 3.6V, R
100
3532 G02
T
1000
T
= 64.9k, unless otherwise specifi ed.
A
1000
100
10
1
0.1
= 25°C, unless otherwise specifi ed.
●
●
●
●
●
3.0
2.5
2.0
1.5
1.0
0.5
0
2.5
Fixed Frequency and Burst Mode
Quiescent Current vs V
BURST MODE
1000kHz
MIN
100
575
0.8
0.4
70
1500kHz
3.5
8000
2000kHz
0.36
0.42
0.88
1.12
0.01
TYP
740
310
0.1
1.1
2.2
88
90
15
1
NOT SWITCHING
V
IN
(V)
LTC3532
4.5
MAX
1.45
885
1.5
10
0
1
IN
500kHz
3532 G03
5.5
UNITS
3532fc
3
80
75
70
65
60
55
50
45
40
kHz
μA
dB
μA
μA
μA
%
%
%
Ω
Ω
A
V
V
V
V