lt3070 Linear Technology Corporation, lt3070 Datasheet - Page 5

• Manufacturer Part Number: lt3070
• Description: 5a, Low Noise, Programmable Output, 85mv Dropout Linear Regulator
• Manufacturer: Linear Technology Corporation

electricAl chArActeristics
PARAMETER
V
V
(Notes 3, 4, 5)
Reference Voltage Noise
(REF/BYP Pin)
Output Voltage Noise
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 LT3070 regulators are tested and specified under pulse load
conditions such that T
Performance at –40°C and 125°C is assured by design, characterization
and correlation with statistical process controls. The LT3070I is
guaranteed over the –40°C to 125°C operating junction temperature range.
The LT3070MP is 100% tested and guaranteed over the –55°C to 125°C
operating junction temperature range.
Note 3: To maintain proper performance and regulation, the BIAS supply
voltage must be higher than the IN supply voltage. For a given V
BIAS voltage must satisfy the following conditions: 2.2V ≤ V
and V
voltage is limited to 2.2V.
Note 4: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification does not apply
for all possible combinations of input voltage and output current. When
operating at maximum output current, limit the input voltage range to
V
temperature range, otherwise specifications are at T
otherwise noted.
BIAS
IN
IN
Ripple Rejection
< V
Ripple Rejection
BIAS
OUT
≥ (1.25 • V
+ 500mV.
OUT
J
≅ T
+ 1V). For V
A
. The LT3070E is 100% tested at T
OUT
CONDITIONS
V
V
V
V
C
V
BW = 10Hz to 100kHz
≤ 0.95V, the minimum BIAS
BIAS
IN
BIAS
IN
REF/BYP
OUT
– V
– V
= 1V, I
= 2.5V, V
= V
OUT
OUT
= 10nF , BW = 10Hz to 100kHz
OUT
= 300mV, I
= 300mV, I
OUT
+ 1.5V
RIPPLE
= 5A, C
AVG
BIAS
A
= 50mV
OUT
OUT
A
= 25°C. C
= 25°C.
, V
REF/BYP
OUT
≤ 3.6V
= 2.5A
= 2.5A
RIPPLE
, the
The
P-P
= 10nF , C
=0.5V
, f
l
OUT
RIPPLE
denotes the specifications which apply over the full operating
= 15µF (Note 9), V
P-P
OUT
Note 5: The LT3070 incorporates safe operating area protection circuitry.
Current limit decreases as the V
foldback starts at V
Characteristics for a graph of Current Limit vs V
current limit foldback feature is independent of the thermal shutdown
circuity.
Note 6: Dropout voltage, V
differential at a specified output current. In dropout, the output voltage
equals V
Note 7: GND pin current is tested with V
current source load. VIOC is a buffered output determined by the value of
V
the margining function.
Note 8: Reverse output current is tested with the IN pins grounded and the
OUT + SENSE pins forced to the rated output voltage. This is measured as
current into the OUT + SENSE pins.
Note 9: Frequency Compensation: The LT3070 must be frequency
compensated at its OUT pins with a minimum C
as a cluster of (15×) 1µF ceramic capacitors or as a graduated cluster
of 10µF/4.7µF/2.2µF ceramic capacitors of the same case size. Linear
Technology only recommends X5R or X7R dielectric capacitors.
= 120Hz,
, f
OUT
= 15µF ,
RIPPLE
as programmed by the V
IN
= 120Hz,
– V
DO
.
IN
IN
– V
= V
OUT
OUT
DO
> 500mV. See the Typical Performance
, is the minimum input to output voltage
+ 0.3V (Note 5), V
O2
IN
-V
-V
O0
MIN
OUT
pins. VIOC’s output is independent of
voltage increases. Current limit
IN
= V
OUT(NOMINAL)
TYP
75
66
10
25
IN
OUT
– V
BIAS
of 15µF configured
OUT
= 2.5V unless
LT3070
voltage. The
MAX
+ 300mV and a
UNITS
µV
µV

3070f
RMS
RMS
dB
dB