LTC3026-1
3
30261f
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage (Note 2)
l
1.14 5.5 V
I
IN
Operating Current I
OUT
= 100μA, V
SHDN
= V
IN
, 1.2V ≤ V
IN
≤ 5V
l
95 200 μA
Shutdown Current V
SHDN
= 0V, V
IN
= 3.5V
l
0.6 20 μA
V
BIAS
BIAS Operating Voltage (Note 6) V
SHDN
= V
IN
l
4.5 5 5.5 V
V
BIASUVLO
BIAS Undervoltage Lockout
l
4.0 4.25 4.4 V
I
BIAS
BIAS Operating Current I
OUT
= 100μA, V
SHDN
= V
IN
l
175 275 μA
BIAS Shutdown Current V
SHDN
= 0V 1 5 μA
V
ADJ
Regulation Voltage (Note 4) 1mA ≤ I
OUT
≤ 1.5A, 1.14V ≤ V
IN
≤ 3.5V, V
BST
= 5V, V
OUT
= 0.8V
1mA ≤ I
OUT
≤ 1.5A, 1.14V ≤ V
IN
≤ 3.5V, V
BST
= 5V, V
OUT
= 0.8V
l
0.397
0.395
0.4
0.4
0.403
0.405
V
V
OUT Programming Range
l
0.4 2.6 V
Dropout Voltage (Note 5) V
IN
= 1.5V, V
ADJ
= 0.38, I
OUT
= 1.5A
l
100 250 mV
I
ADJ
ADJ Input Current V
ADJ
= 0.4V
l
–100 100 nA
I
OUT
Continuous Output Current V
SHDN
= V
IN
l
1.5 A
I
LIM
Output Current Current Limit 3A
e
n
Output Voltage Noise f = 10Hz to 100kHz, I
L
= 800mA 110 μV
RMS
V
IHSHDN
SHDN Input High Voltage 1.14V ≤ V
IN
≤ 3.5V
3.5V ≤ V
IN
≤ 5.5V
l
l
1.0
1.2
V
V
V
ILSHDN
SHDN Input Low Voltage 1.14V ≤ V
IN
≤ 5.5V
l
0.4 V
I
IHSHDN
SHDN Input High Current SHDN = V
IN
–1 1 μA
I
ILSHDN
SHDN Input Low Current SHDN = 0V –1 1 μA
V
OLPG
PG Output Low Voltage I
PG
= 2mA
l
0.1 0.4 V
I
OHPG
PG Output High Leakage
Current
V
PG
= 5.5V 0.01 1 μA
PG Output Threshold (Note 3) PG High to Low
PG Low to High
–12
–10
–9
–7
–6
–4
%
%
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
J
= 25°C. (Note 7) V
IN
= 1.5V, V
OUT
= 1.2V, V
BIAS
= 5V, C
IN
= C
BIAS
= 1μF,
C
OUT
= 10μF (all capacitors ceramic) unless otherwise noted.
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. This IC has overtemperature protection that is
intended to protect the device during momentary overload conditions.
Junction temperatures will exceed 125°C when overtemperature is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 2: Minimum Operating Voltage required for regulation is:
V
IN
≥ V
OUT(MIN)
+ V
DROPOUT
Note 3: PG threshold expressed as a percentage difference from the
“V
ADJ
Regulation Voltage” as given in the table.
Note 4: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply
for all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current, the input voltage
range must be limited.
Note 5: Dropout voltage is minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout, the
output voltage will be equal to V
IN
– V
DROPOUT
.
Note 6: To maintain correct regulation
V
OUT
≤ V
BIAS
– 2.4V
Note 7: The LTC3026-1 is tested under pulsed load conditions such
that T
J
≈ T
A
. The LTC3026E-1 is guaranteed to meet specifications from
0°C to 125°C junction temperature. Specifications over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3026I-1 is guaranteed over the –40°C to 125°C operating junction
temperature range. 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
J
, in °C) is calculated from the ambient temperature (T
A
, in °C) and
power dissipation (PD, in Watts) according to the formula:
T
J
= T
A
+ (PD • θ
JA
), where θ
JA
(in °C/W) is the package thermal
impedance.
