LT3070E/LT3070I ............................. –40°C to 125°C
LT3070MP ......................................... –55°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
UFD PACKAGE
28-LEAD (4mm
×
5mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 30°C/W TO 35°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3070EUFD#PBF
LT3070IUFD#PBF
LT3070MPUFD#PBF
LEAD BASED FINISH
LT3070EUFD
LT3070IUFD
LT3070MPUFD
TAPE AND REEL
LT3070EUFD#TRPBF
LT3070IUFD#TRPBF
LT3070MPUFD#TRPBF
TAPE AND REEL
LT3070EUFD#TR
LT3070IUFD#TR
LT3070MPUFD#TR
PART MARKING*
3070
3070
3070
PART MARKING*
3070
3070
3070
PACKAGE DESCRIPTION
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
PACKAGE DESCRIPTION
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
2
3070fc
For more information
www.linear.com/LT3070
LT3070
ELECTRICAL CHARACTERISTICS
PARAMETER
IN Pin Voltage Range
BIAS Pin Voltage Range (Note 3)
Regulated Output Voltage
V
OUT
= 0.8V, 10mA ≤ I
OUT
≤ 5A, 1.05V ≤ V
IN
≤ 1.25V
V
OUT
= 0.9V, 10mA ≤ I
OUT
≤ 5A, 1.15V ≤ V
IN
≤ 1.35V
V
OUT
= 1V, 10mA ≤ I
OUT
≤ 5A, 1.25V ≤ V
IN
≤ 1.45V
V
OUT
= 1.1V, 10mA ≤ I
OUT
≤ 5A, 1.35V ≤ V
IN
≤ 1.55V
V
OUT
= 1.2V, 10mA ≤ I
OUT
≤ 5A, 1.45V ≤ V
IN
≤ 1.65V, V
BIAS
=
3.3V
V
OUT
= 1.5V, 10mA ≤ I
OUT
≤ 5A, 1.75V ≤ V
IN
≤ 1.95V, V
BIAS
=
3.3V
V
OUT
= 1.8V, 10mA ≤ I
OUT
≤ 5A, 2.05V ≤ V
IN
≤ 2.25V, V
BIAS
=
3.3V
MARGTOL = 0V, MARGSEL = V
BIAS
MARGTOL = 0V, MARGSEL = 0V, I
OUT
= 10mA
MARGTOL = FLOAT, MARGSEL = V
BIAS
MARGTOL = FLOAT, MARGSEL = 0V, I
OUT
= 10mA
MARGTOL = V
BIAS
, MARGSEL= V
BIAS
MARGTOL = V
BIAS
, MARGSEL = 0V, I
OUT
= 10mA
Line Regulation to V
IN
Line Regulation to V
BIAS
Load Regulation,
∆I
OUT
= 10mA to 5A
V
OUT
= 0.8V,
∆V
IN
= 1.05V to 2.7V, V
BIAS
= 3.3V, I
OUT
= 10mA
V
OUT
= 1.8V,
∆V
IN
= 2.05V to 2.7V, V
BIAS
= 3.3V, I
OUT
= 10mA
V
OUT
= 0.8V,
∆V
BIAS
= 2.2V to 3.6V, V
IN
= 1.1V, I
OUT
= 10mA
V
OUT
= 1.8V,
∆V
BIAS
= 3.25V to 3.6V, V
IN
= 2.1V, I
OUT
= 10mA
V
BIAS
= 2.5V, V
IN
= 1.05V, V
OUT
= 0.8V
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. C
OUT
= 15µF (Note 9), V
IN
= V
OUT
+ 0.3V (Note 5), V
BIAS
= 2.5V unless
otherwise noted.
CONDITIONS
V
IN
≥ V
OUT
+ 150mV, I
OUT
= 5A
l
l
l
l
l
l
l
l
l
MIN
0.95
2.2
0.792
0.891
0.990
1.089
1.188
1.485
1.782
TYP
MAX
3.0
3.6
UNITS
V
V
V
V
V
V
V
V
V
0.800
0.900
1.000
1.100
1.200
1.500
1.800
0.808
0.909
1.010
1.111
1.212
1.515
1.818
Regulated Output Voltage Margining
(Note 3)
l
l
l
l
l
l
l
l
l
l
0.8
–1.2
2.7
–3.3
4.6
–5.4
1
–1
3
–3
5
–5
1.2
–0.8
3.3
–2.7
5.4
–4.6
1.0
1.0
2.0
1.0
%
%
%
%
%
%
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
–1.5
–2
l
–3.0
–5.5
–4.0
–7.5
–4.0
–7.5
–5.0
–9.0
–7.0
–13
35
65
85
120
150
65
400
V
BIAS
= 2.5V, V
IN
= 1.25V, V
OUT
= 1.0V
V
BIAS
= 3.3V, V
IN
= 1.45V, V
OUT
= 1.2V
l
–2
–2.5
l
V
BIAS
= 3.3V, V
IN
= 1.75V, V
OUT
= 1.5V
V
BIAS
= 3.3V, V
IN
= 2.05V, V
OUT
= 1.8V
l
–3
l
l
Dropout Voltage,
V
IN
= V
OUT(NOMINAL)
(Note 6)
I
OUT
= 1A, V
OUT
= 1V
I
OUT
= 2.5A, V
OUT
= 1V
I
OUT
= 5A, V
OUT
= 1V
20
50
85
l
SENSE Pin Current
V
IN
= 1.1V, V
SENSE
= 0.8V
V
BIAS
= 3.3V, V
IN
= 2.1V, V
SENSE
= 1.8V
l
l
35
200
50
300
3070fc
For more information
www.linear.com/LT3070
3
LT3070
ELECTRICAL CHARACTERISTICS
PARAMETER
Ground Pin Current,
V
IN
= 1.3V, V
OUT
= 1V
BIAS Pin Current in Nap Mode
BIAS Pin Current,
V
IN
= 1.3V, V
OUT
= 1V
CONDITIONS
I
OUT
= 10mA
I
OUT
= 5A
EN = Low
I
OUT
= 10mA
I
OUT
= 100mA
I
OUT
= 500mA
I
OUT
= 1A
I
OUT
= 2.5A
I
OUT
= 5A
V
IN
– V
OUT
< 0.3V, V
BIAS
= 3.3V
V
IN
– V
OUT
= 1.0V, V
BIAS
= 3.3V
V
IN
– V
OUT
= 1.7V, V
BIAS
= 3.3V
V
IN
= 0V, V
OUT
= 1.8V
Percentage of V
OUT(NOMINAL)
, V
OUT
Rising
Percentage of V
OUT(NOMINAL)
, V
OUT
Falling
I
PWRGD
= 200µA (Fault Condition)
V
BIAS
Rising
V
BIAS
Falling
V
IN
= V
OUT(NOMINAL)
+ 150mV, Sourcing Out of the Pin
V
IN
= V
OUT(NOMINAL)
+ 450mV, Sinking Into the Pin
Input Falling
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. C
OUT
= 15µF (Note 9), V
IN
= V
OUT
+ 0.3V (Note 5), V
BIAS
= 2.5V unless
otherwise noted.
MIN
0.65
0.9
120
0.75
1.25
2.0
2.6
3.5
4.5
5.1
3.2
1.2
87
82
1.1
0.9
250
160
170
TYP
1.1
1.35
200
1.08
1.8
3.0
3.8
5.2
6.9
6.4
4.5
2.5
300
90
85
50
1.55
1.4
300
235
255
MAX
1.8
2.3
320
1.5
2.4
4.0
5.0
7.0
10.0
7.7
5.8
4.3
450
93
88
150
2.1
1.7
350
310
340
0.25
0.75
V
BIAS
– 0.25
60
V
IH
= V
BIAS
= 2.5V, Current Flows Into Pin
V
IL
= 0V, V
BIAS
= 2.5V, Current Flows Out of Pin
V
OUT
= Off to On, V
BIAS
= 2.5V
V
OUT
= On to Off, V
BIAS
= 2.5V
V
OUT
= Off to On, V
BIAS
=2.2V to 3.6V
V
OUT
= On to Off, V
BIAS
=2.2V to 3.6V
V
EN
= V
BIAS
= 2.5V
l
l
l
l
l
l
l
UNITS
mA
mA
µA
mA
mA
mA
mA
mA
mA
A
A
A
µA
%
%
mV
V
V
mV
µA
µA
V
V
V
mV
Current Limit (Note 5)
Reverse Output Current (Note 8)
PWRGD V
OUT
Threshold
PWRGD V
OL
V
BIAS
Undervoltage Lockout
V
IN
-V
OUT
Servo Voltage by VIOC
VIOC Output Current
V
IL
Input Threshold (Logic-0 State),
V
O2
, V
O1
, V
O0
, MARGSEL, MARGTOL
V
IZ
Input Range (Logic-Z State),
V
O2
, V
O1
, V
O0
, MARGSEL, MARGTOL
V
IH
Input Threshold (Logic-1 State),
V
O2
, V
O1
, V
O0
, MARGSEL, MARGTOL
Input Hysteresis (Both Thresholds),
V
O2
, V
O1
, V
O0
, MARGSEL, MARGTOL
Input Current High,
V
O2
, V
O1
, V
O0
, MARGSEL, MARGTOL
Input Current Low,
V
O2
, V
O1
, V
O0
, MARGSEL, MARGTOL
EN Pin Threshold
V
BIAS
– 0.9
Input Rising
l
25
25
40
40
1.4
0.56 • V
BIAS
µA
µA
V
V
V
V
µA
0.9
0.36 • V
BIAS
2.5
4.0
EN Pin Logic High Current
6.5
4
3070fc
For more information
www.linear.com/LT3070
LT3070
ELECTRICAL CHARACTERISTICS
PARAMETER
EN Pin Logic Low Current
V
BIAS
Ripple Rejection
V
IN
Ripple Rejection
(Notes 3, 4, 5)
Reference Voltage Noise
(REF/BYP Pin)
Output Voltage Noise
CONDITIONS
V
EN
= 0V
V
BIAS
= V
OUT
+ 1.5V
AVG
, V
RIPPLE
=0.5V
P-P
, f
RIPPLE
= 120Hz,
V
IN
– V
OUT
= 300mV, I
OUT
= 2.5A
V
BIAS
= 2.5V, V
RIPPLE
= 50mV
P-P
, f
RIPPLE
= 120Hz,
V
IN
– V
OUT
= 300mV, I
OUT
= 2.5A
C
REF/BYP
= 10nF, BW = 10Hz to 100kHz
V
OUT
= 1V, I
OUT
= 5A, C
REF/BYP
= 10nF, C
OUT
= 15µF,
BW = 10Hz to 100kHz
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. C
OUT
= 15µF (Note 9), V
IN
= V
OUT
+ 0.3V (Note 5), V
BIAS
= 2.5V unless
otherwise noted.
MIN
TYP
75
66
10
25
MAX
0.1
UNITS
µA
dB
dB
µV
RMS
µV
RMS
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
J
≅
T
A
. The LT3070E is 100% tested at T
A
= 25°C.
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
OUT
, the
BIAS voltage must satisfy the following conditions: 2.2V ≤ V
BIAS
≤ 3.6V
and V
BIAS
≥ (1.25 • V
OUT
+ 1V). For V
OUT
≤ 0.95V, the minimum BIAS
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
IN
< V
OUT
+ 500mV.
Note 5:
The LT3070 incorporates safe operating area protection circuitry.
Current limit decreases as the V
IN
-V
OUT
voltage increases. Current limit
foldback starts at V
IN
– V
OUT
> 500mV. See the Typical Performance
Characteristics for a graph of Current Limit vs V
IN
– V
OUT
voltage. The
current limit foldback feature is independent of the thermal shutdown
circuity.
Note 6:
Dropout voltage, V
DO
, is the minimum input to output voltage
differential at a specified output current. In dropout, the output voltage
equals V
IN
– V
DO
.
Note 7:
GND pin current is tested with V
IN
= V
OUT(NOMINAL)
+ 300mV and a
current source load. VIOC is a buffered output determined by the value of
V
OUT
as programmed by the V
O2
-V
O0
pins. VIOC’s output is independent
of 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
OUT
of 15µF configured
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.
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
