ltc3528-2 Linear Technology Corporation, ltc3528-2 Datasheet - Page 3

• Manufacturer Part Number: ltc3528-2
• Description: Ltc3528-2 - 1a, 2mhz Synchronous Step-up Dc/dc Converter In 2mm ? 3mm Dfn
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Duty Cycle
Frequency
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN Input Current
PGOOD Threshold Percentage
PGOOD Low Voltage
PGOOD Leakage 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 LTC3528-2 is tested under pulsed load conditions such that
T
85°C junction temperature. Specifications over –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. Note that the maximum
ambient temperature consistent with these specifications is determined by
specific operating conditions in conjunction with board layout, the rated
package thermal impedance and other environmental factors. The junction
temperature (T
°C) and power dissipation (P
where θ
TYPICAL PERFORMANCE CHARACTERISTICS
junction temperature range, otherwise specifications are at T
J
≈ T
T
J
A
= T
. The LTC3528E-2 is guaranteed to meet specifications from 0°C to
JA
A
= 76°C/W is the package thermal impedance.
+ (P
J
D
, in °C) is calculated from the ambient temperature (T
• θ
100
90
80
70
60
50
40
30
20
10
JA
0
0.01
)
Efficiency vs Load Current
and V
EFFICIENCY
D
IN
0.1
, in Watts) according to the formula:
for V
LOAD CURRENT (mA)
OUT
1
= 1.8V
10
CONDITIONS
V
V
Referenced to Feedback Voltage Falling
I
V
V
PGOOD
FB
SHDN
OUT
PGOOD
POWER
LOSS
= 1.3V
= 1.6V, I
V
V
V
100
IN
IN
IN
= 1.2V
= 1mA
= 5.5V
= 1V
= 1.2V
= 1.5V
35282 G01
1000
PGOOD
1000
100
10
1
0.1
0.01
= 1mA
The
A
, in
A
= 25°C (Note 2). V
l
denotes the specifications which apply over the specified operating
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: Current measurements are made when the output is not switching.
Note 5: 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.
Note 6: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
76°C/W.
Note 7: The IC is tested in a feedback loop to make the measurement.
100
90
80
70
60
50
40
30
20
10
0
0.01
IN
Efficiency vs Load Current
and V
(T
= 1.2V, V
A
EFFICIENCY
= 25°C unless otherwise noted)
IN
0.1
for V
LOAD CURRENT (mA)
OUT
OUT
1
l
l
= 3.3V, unless otherwise noted.
= 3V
0.88
10
MIN
1.8
–7
POWER
LOSS
V
V
V
100
IN
IN
IN
= 1V
= 1.5V
= 2.4V
LTC3528-2
0.05
0.05
0.01
TYP
–10
2.0
0.3
35282 G26
1000
1000
100
10
1
0.1
0.01
MAX
0.25
–13
2.4
0.1
0.2
0
1
1
UNITS
35282fa
3
MHz
µA
µA
%
%
V
V
V
V