LTM4615(RevB) Ver la hoja de datos (PDF) - Linear Technology
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LTM4615 Datasheet PDF : 24 Pages
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LTM4615
Electrical Characteristics The l denotes the specifications which apply over the full internal
operating temperature range (Note 2), otherwise specifications are at TA = 25°C, VIN = 5V, LDO_IN = 1.2V unless otherwise noted.
Per Typical Application Figure 12.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VLDO Section
VLDO_IN
IIN(LDO_IN)
IIN(SHDN)
VBOOST3
VBOOST3(UVLO)
VFB3
VLDO_OUT
VDO
LDO_RHI
Operating Voltage
(Note 3)
l 1.14
3.5
V
Operating Current
Shutdown Current
IOUT = 0mA, VOUT = 1V, EN3 = 1.2V
EN3 = 0V, LDO_IN = 1.5V
1
mA
0.6
20
µA
BOOST3 Output Voltage
EN3 = 1.2V
4.8
5
5.2
V
Undervoltage Lockout
4.3
V
FB3 Internal Reference Voltage
Output Voltage Range
1mA ≤ IOUT ≤ 1.5A, 1.14V ≤ VLDO_IN ≤ 3.5V,
BOOST3 = 5V, 1V ≤ VOUT ≤ 2.59V
0.397 0.4 0.404
V
l 0.395 0.4 0.405
V
0.4
2.6
V
Dropout Voltage
LDO Top Feedback Resistor
VLDO_IN = 1.5V, VFB3 = 0.38V, IOUT = 1.5A (Note 4)
100 250
mV
4.96 4.99 5.02
kΩ
IOUT
ILIM
en
VIH_EN3
VIL_EN3
IIN_EN3
VOL_PGOOD3
PGOOD Threshold
Output Current
Output Current Limit
Output Voltage Noise
EN3 Input High Voltage
EN3 Input Low Voltage
EN3 Input Current
PGOOD Low Voltage
Output Threshold
Relative to VFB3
VEN3 = 1.2V
(Note 5)
Frequency = 10Hz to 1MHz, ILOAD = 1A
1.14V ≤ VLDO_IN ≤ 3.5V
1.14V ≤ VLDO_IN ≤ 3.5V
IPGOOD3 = 2mA
PGOOD3 High to Low
PGOOD3 Low to High
l 1.5
A
2.5
A
300
µRMS
l1
V
0.4
V
–1
1
µA
0.1
0.4
V
–14 –12 –10
%
–4
–3
–2
%
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 LTM4615 is tested under pulsed load conditions such that
TJ ≈ TA. The LTM4615E is guaranteed to meet performance specifications
over the 0°C to 125°C internal operating temperature range. Specifications
over the –40°C to 125°C internal operating temperature range are assured
by design, characterization and correlation with statistical process
controls. The LTM4615I is guaranteed to meet specifications over the full
internal operating temperature range. Note that the maximum ambient
temperature is determined by specific operating conditions in conjunction
with board layout, the rated package thermal resistance and other
environmental factors.
Note 3: Minimum operating voltage required for regulation is:
VIN ≥ VOUT(MIN) + VDROPOUT
Note 4: Dropout voltage is the minimum input to output differential needed
to maintain regulation at a specified output current. In dropout the output
voltage will be equal to VIN – VDROPOUT .
Note 5: The LTM4615 has overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 125°C when overtemperature is activated.
Continuous overtemperature activation can impair long-term reliability.
Note 6: See output current derating curves for different VIN, VOUT and TA.
4615fb
4
For more information www.linear.com/LTM4615
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