LT1076-5 Linear Technology, LT1076-5 Datasheet - Page 3

• Manufacturer Part Number: LT1076-5
• Description: 5V Step-Down Switching Regulator
• Manufacturer: Linear Technology

ELECTRICAL C
PARAMETER
Switching Frequency
Switching Frequency Line Regulation
Error Amplifier Voltage Gain (Note 7)
Error Amplifier Transconductance (Note 7)
Error Amplifier Source and Sink Current
Sense Pin Divider Resistance
Sense Voltage
Output Voltage Tolerance
Output Voltage Line Regulation
V
Multiplier Reference Voltage
Shutdown Pin Current
Shutdown Thresholds
Thermal Resistance Junction to Case
The
temperature range.
Note 1: To calculate maximum switch “on” voltage at currents between
low and high conditions, a linear interpolation may be used.
Note 2: A sense pin voltage (V
clamp level and the switch duty cycle to zero. This approximates the zero
load condition where duty cycle approaches zero.
Note 3: Total voltage from V
up for proper regulation. For T
Note 4: Switch frequency is internally scaled down when the sense pin
voltage is less than 2.6V to avoid extremely short switch on times. During
current limit testing, V
of 1 s.
C
Voltage at 0% Duty Cycle
denotes specifications which apply over the full operating
SENSE
IN
is adjusted to give a minimum switch on time
HARA TERISTICS
SENSE
A
pin to ground pin must be 8V after start-
< 25 C, limit = 5V.
) of 5.5V forces the V
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
C
CONDITIONS
All Conditions of Input Voltage, Output Voltage,
Switch Duty Cycle = 0
T
V
8V V
1V V
Source (V
Sink (V
V
V
Temperature and Load Current
8V V
Over Temperature
V
V
Fully Shut Down
J
OUT
C
OUT
SHDN
SHDN
= 2V
C
125 C
= V
(Nominal) = 5V
pin to its low
IN
C
IN
= 5V
SENSE
SENSE
V
SENSE
THRESHOLD
4V
V
V
MAX
MAX
T
= 5.5V)
J
= 0V (Note 4)
= 4.5V)
= 25 C, V
(Note 7)
(Note 6)
( 2.5V)
Note 5: Switch to input voltage limitation must also be observed.
Note 6: V
Note 7: Error amplifier voltage gain and transconductance are specified
relative to the internal feedback node. To calculate gain and
transconductance from the Sense pin (Output) to the V
0.44.
Note 8: Does not include switch leakage.
Note 9: I
IN
= 25V, unless otherwise noted.
LIM
MAX
= 40V for the LT1076-5 and 60V for the LT1076HV-5.
R
LIM
5k
– 1k
3700
MIN
4.85
100
0.7
2.2
0.1
90
85
3
5
0.005
–4.0
2000
5000
TYP
0.03
2.45
0.30
100
140
1.0
20
1.5
24
10
0.5
1.0
5
5
MAX
8000
5.15
0.02
110
120
225
0.1
1.6
2.7
0.5
LT1076-5
20
50
8
4
C
2
3
pin, multiply by
UNITS
mV/ C
3
%/ V
%/ V
mho
C/ W
V/ V
kHz
kHz
kHz
mA
k
%
%
A
V
V
V
A
A
V
V