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LTC3566 Datasheet, PDF (5/28 Pages) Linear Technology – High Effi ciency USB Power Manager Plus 1A Buck-Boost Converter
LTC3566
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBUS = 5V, VBAT = 3.8V, DVCC = 3.3V, RCLPROG = 3.01k, RPROG = 1k,
VIN1 = VOUT1 = 3.8V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
VOUT1(LOW)
Minimum Regulated Output Voltage For Burst Mode Operation or
Synchronous PWM Operation
2.65
2.75
V
VOUT1(HIGH)
ILIMF1
IPEAK1(BURST)
Maximum Regulated Output Voltage
Forward Current Limit (Switch A) PWM Mode
Forward Burst Current Limit (Switch Burst Mode Operation
A)
5.50
5.60
V
●
2
2.5
3
A
●
200
275
350
mA
IZERO1(BURST)
Reverse Burst Current Limit (Switch Burst Mode Operation
D)
●
–30
0
30
mA
IMAX1(BURST) Maximum Deliverable Output Current 2.7V ≤ VIN1 ≤ 5.5V, 2.75V ≤ VOUT ≤ 5.5V
50
mA
in Burst Mode Operation
(Note 6)
VFB1
Feedback Servo Voltage
● 0.780
0.800
0.820
V
IFB1
FB1 Input Current
VFB1 = 0.8V
–50
50
nA
RDS(ON)P
PMOS RDS(ON)
Switches A, D
0.22
Ω
RDS(ON)N
NMOS RDS(ON)
Switches B, C
0.17
Ω
ILEAK(P)
PMOS Switch Leakage
Switches A, D
–1
1
μA
ILEAK(N)
NMOS Switch Leakage
Switches B, C
–1
1
μA
RVOUT1
DBUCK(MAX)
VOUT1 Pull-Down in Shutdown
Maximum Buck Duty Cycle
PWM Mode
10
kΩ
●
100
%
DBOOST(MAX)
Maximum Boost Duty Cycle
PWM Mode
75
%
tSS1
Soft-Start Time
0.5
ms
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 LTC3566E 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 correlation
with statistical process controls.
Note 3: The LTC3566 includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 125°C when overtemperature protection is
active. Continuous operation above the specified maximum operating
junction temperature may impair device reliability.
Note 4: Total input current is the sum of quiescent current, IVBUSQ,
and measured current given by:
VCLPROG/RCLPROG • (hCLPROG + 1)
Note 5: hC/10 is expressed as a fraction of measured full charge current
with indicated PROG resistor.
Note 6: Guaranteed by design.
3566fa
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