L5973D STMicroelectronics, L5973D Datasheet - Page 5

• Manufacturer Part Number: L5973D
• Description: IC REG SWITCHING STEPDOWN SOIC-8
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5973D

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.24 ~ 35 V
• Current - Output: 2.5A
• Frequency - Switching: 250kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width) Exposed Pad, 8-eSOIC. 8-HSOIC
• Power - Output: 2.25W
• Output Voltage: 35 V
• Output Current: 2.5 A
• Input Voltage: 4 V to 36 V
• Switching Frequency: 212 KHz to 280 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Current, Input Bias: 2.5 μA
• Current, Output: 300 μA
• Current, Supply: 2.5 mA
• Frequency, Oscillator: 250 kHz
• Package Type: HSOP-8
• Power Dissipation: 2.25 W
• Regulation, Line: 5 mV
• Regulation, Load: 8 mV
• Regulator Type: Low Dropout, Switching
• Temperature, Operating, Range: -40 to +150 °C
• Transconductance: 2.3
• Voltage, Gain: 57 dB
• Voltage, Input: 36 V
• Voltage, Output: 35 V
• Voltage, Output, High: 3.5 V
• Voltage, Output, Low: 0.4 V
• Voltage, Supply: 12 V
• No. Of Pins: 8
• Rohs Compliant: Yes
• Primary Input Voltage: 36V
• No. Of Outputs: 1
• Switching Frequency Max: 250kHz
• Supply Voltage Max: 36V
• Low Dropout Operation: 100 % duty cycle
• For Use With: 497-4134 - EVAL BOARD FOR L5973 SERIES497-4133 - EVAL BOARD FOR L5973 SERIES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L5973D
3
Electrical characteristics
Table 4.
Dynamic characteristics (see test circuit ).
DC characteristics
Inhibit
Error amplfier
Symbol
R
I
o source
I
I
qst-by
V
V
DS(on)
o sink
I
V
V
qop
f
I
h
OH
CC
I
OL
s
q
l
5
Electrical characteristics
( T
Operating input
voltage range
Mosfet on
Resistance
Maximum limiting
current
Switching frequency
Duty cycle
Voltage feedback
Efficiency
Total operating
quiescent current
Quiescent current
Total stand-by
quiescent current
INH threshold
voltage
High level output
voltage
Low level output
voltage
Source output
current
Sink output current
J
= 25 °C, V
Parameter
CC
= 12 V, unless otherwise specified)
V
V
4.4 V < V
20 mA < I
V
Duty Cycle = 0;
V
V
V
V
Device ON
Device OFF
VFB = 1 V
VFB = 1.5 V
V
V
V
V
o
CC
O
FB
inh
CC
inh
COMP
FB
COMP
FB
= 1.235 V; I
= 5 V, V
= 1.5 V
> 2.2 V
> 2.2 V
= 1 V
= 1.5 V
= 4.4 V to 36 V
= 36 V;
Test condition
= 1.9 V;
= 1.9 V;
CC
O
CC
< 2 A
< 36 V,
o
= 12 V
= 2 A
(1)
(1)
(1)
(1)
(1)
(1)
(1)
1.220 1.235
1.198 1.235 1.272
Min
212
225
200
2.5
2.2
3.5
Electrical characteristics
4
0
1
0.250
Typ
250
250
300
1.5
90
50
80
3
3
Max
1.25
280
275
100
100
150
0.5
3.5
2.5
0.8
0.4
36
5
Unit
kHz
kHz
mA
mA
mA
µA
µA
µA
%
%
Ω
V
A
V
V
V
V
V
V
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