L4971 STMicroelectronics, L4971 Datasheet - Page 4

• Manufacturer Part Number: L4971
• Description: IC REG SW 1.5A STEP DOWN 8-DIP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4971

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3 ~ 50 V
• Current - Output: 1.5A
• Frequency - Switching: 100kHz ~ 300kHz
• Voltage - Input: 8 ~ 55 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power - Output: 1W
• Output Voltage: 50 V
• Mounting Style: Through Hole
• For Use With: 497-4744 - BOARD EVAL FOR L4971/L4978 REG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6697-5; E-L4971; E-L4971; L4971

L4971
Table 5. (T
* Specification Refered to T
4/13
Soft Start
Inhibit
DC Characteristics
Error Amplifier
Oscillator Section
SVRR E/A
I
o source
I
I
qst-by
o sink
I
V
V
V
I
V
gm
qop
R
sLL
I
I
FB
oH
LL
q
oL
b
L
j
= 25°C, Cosc = 2.7nF, Rosc = 20kΩ, V
Soft start charge current
Soft start discharge current
Low level voltage
Isource Low level
Total operating quiescent
current
Quiescent current
Total stand-by quiescent
current
Voltage Feedback Input
Line regulation
Ref. voltage stability vs
temperature
High level output voltage
Low level output voltage
Source output current
Sink output current
Source bias current
Supply voltage ripple rejection
DC open loop gain
Transconductance
Ramp Valley
Ramp peak
Maximum duty cycle
Maximum Frequency
j
from 0 to 125°C
Duty Cycle = 0; V
V
Vcc = 55V; Vinh<0.9V
Vcc = 8 to 55V
V
V
V
V
V
R
I
V
Vcc = 8V
Vcc = 55V
Duty Cycle = 0% ;
R
comp
inh
FB
FB
comp
comp
comp
comp
L
osc
=
= 2.5V
= 3.8V
<0.9V
= 13kΩ, C
∞
= -0.1 to 0.1mA
= 6V; V
= 6V; V
= V
= 6V
fb
; V
CC
FB
FB
cc
= 24V, unless otherwise specified.)
osc
= 3.8V
= 8 to 55V
= 2.5V
FB
= 820pF
= 3.8V
*
*
*
3.33
10.3
0.78
200
200
30
60
50
95
6
2
9
3.36
0.85
2.15
100
150
300
300
2.5
0.4
2.5
9.6
40
10
80
57
97
5
4
5
2
3.39
0.65
0.92
10.2
200
300
300
0.9
3.5
2.3
15
50
14
10
6
3
mV/°C
kHz
mA
mA
mV
ms
µA
µA
µA
µA
µA
µA
µA
µA
dB
dB
%
V
V
V
V
V
V
V