LT1374CR-5 Linear Technology, LT1374CR-5 Datasheet - Page 3

• Manufacturer Part Number: LT1374CR-5
• Description: IC SW REG 4.5A 5V STEP-DWN 7-DD
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT1374CR-5

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 4.5A
• Frequency - Switching: 500kHz
• Voltage - Input: 5 ~ 25 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (7 leads + tab)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Gain is measured with a V
switching threshold level to 200mV below the upper clamp level.
Note 3: Minimum input voltage is not measured directly, but is guaranteed
by other tests. It is defined as the voltage where internal bias lines are still
ture range, otherwise specifications are at T
PARAMETER
Feedback Voltage (Adjustable)
Sense Voltage (Fixed 5V)
SENSE Pin Resistance
Reference Voltage Line Regulation
Feedback Input Bias Current
Error Amplifier Voltage Gain
Error Amplifier Transconductance
V
Error Amplifier Source Current
Error Amplifier Sink Current
V
V
Switch Current Limit
Slope Compensation (Note 9)
Switch On Resistance (Note 7)
Maximum Switch Duty Cycle
Switch Frequency
Switch Frequency Line Regulation
Frequency Shifting Threshold on FB Pin
Minimum Input Voltage (Note 3)
Minimum Boost Voltage (Note 4)
Boost Current (Note 5)
V
BIAS Supply Current (Note 6)
Shutdown Supply Current
Lockout Threshold
Shutdown Thresholds
Synchronization Threshold
Synchronizing Range
SYNC Pin Input Resistance
C
C
C
IN
Pin to Switch Current Transconductance
Pin Switching Threshold
Pin High Clamp
Supply Current (Note 6)
C
swing equal to 200mV above the
CONDITIONS
All Conditions
All Conditions
5V ≤ V
(Notes 2, 8)
∆I (V
V
V
Duty Cycle = 0
V
DC = 80%
I
V
V
5V ≤ V
∆f = 10kHz
I
I
I
V
V
V
V
V
V
Device Starting Up
SW
SW
SW
SW
FB
FB
C
FB
C
BIAS
BIAS
SHDN
SHDN
C
C
Open, V
Set to Give 50% Duty Cycle
Open
Open Device Shutting Down
J
= 2.1V or V
= 2.7V or V
= 4.5A
= 2.1V or V
≤ 4.5A
= 1A
= 4.5A
C
= 25°C. V
= 5V
= 5V
) = ±10µA (Note 8)
IN
IN
= 0V, V
= 0V, V
≤ 25V, (5V ≤ V
≤ 25V (5V ≤ V
FB
= 2.1V or V
IN
IN
SENSE
SENSE
SENSE
IN
≤ 25V, V
≤ 32V, V
= 15V, V
The
= 4.4V
= 5.6V
= 4.4V
IN
IN
●
SENSE
SW
SW
≤ 32V for LT1374HV)
≤ 32V for LT1374HV)
denotes specifications which apply over the full operating tempera-
= 0V, V
= 0V, V
C
= 1.5V, Boost = V
= 4.4V, DC ≤ 50%
regulated so that the reference voltage and oscillator frequency remain
constant. Actual minimum input voltage to maintain a regulated output will
depend on output voltage and load current. See Applications Information.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
C
C
Open
Open
IN
+ 5V, switch open, unless otherwise noted.
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
1500
1000
MIN
2.39
2.36
4.94
4.90
0.13
0.25
200
140
140
460
440
580
4.5
0.8
2.3
90
86
7
2000
2.42
0.01
0.07
2.38
0.37
0.45
TYP
400
225
225
500
5.0
0.5
5.3
0.9
2.1
0.8
1.0
5.0
2.3
0.9
3.2
1.5
10
93
93
20
90
20
30
40
6
0
2700
3100
1000
MAX
2.45
2.48
5.06
5.10
0.03
0.13
0.15
2.46
0.60
320
320
540
560
140
100
8.5
0.1
1.3
5.5
3.0
1.4
4.0
0.7
2.2
14
35
50
75
75
2
LT1374
UNITS
µMho
µMho
1374fd
3
%/ V
%/V
A/ V
kHz
kHz
kHz
mA
mA
mA
mA
kΩ
kΩ
µA
µA
µA
µA
µA
µA
µA
%
%
Ω
Ω
V
V
V
V
V
V
A
A
V
V
V
V
V
V
V