L5981 STMicroelectronics, L5981 Datasheet - Page 6

• Manufacturer Part Number: L5981
• Description: IC REG SW STEP DOWN 1A 8-VFQFPN
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5981

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 18 V
• Current - Output: 1A
• Frequency - Switching: 250kHz ~ 1MHz
• Voltage - Input: 2.9 ~ 18 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-VFQFN, 8-VFQFPN
• Power - Output: 1.5W
• Output Voltage: 3 V
• Output Current: 1 A
• Input Voltage: 2.9 V to 18 V
• Switching Frequency: 220 KHz to 275 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Low Dropout Operation: 100 % duty cycle
• For Use With: 497-6385 - BOARD EVAL FOR L5981
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Electrical characteristics
6/37
Table 4.
1. Specification refered to T
2. Guaranteed by design.
Error amplifier
Synchronization function
Protection
I
O SOURCE
Symbol
I
I
T
FBDISC
assured by design, characterization and statistical correlation.
O SINK
V
V
SHDN
I
G
FB
CH
CL
V
High level output voltage
Low level output voltage
Bias source current
Source COMP pin
Sink COMP pin
Open loop voltage gain
High input voltage
Low input voltage
Slave sink current
Master output amplitude
Output pulse width
Input pulse width
FB disconnection source
current
Thermal shutdown
Hystereris
Electrical characteristics (continued)
Parameter
J
from -40 to +125 °C. Specification in the -40 to +125 °C temperature range are
Doc ID 13004 Rev 6
V
V
V
V
V
(2)
V
I
SYNCH floating
SOURCE
FB
FB
FB
FB
FB
SYNCH
< 0.6 V
> 0.6 V
= 0 V to 0.8 V
= 0.5 V, V
= 0.7 V, V
Test condition
= 2.9 V
= 4.5 mA
COMP
COMP
=1 V
=1 V
Min
2.0
70
3
2
Values
Typ
100
110
150
0.7
20
25
30
1
1
Max
0.1
3.3
0.9
1
L5981
Unit
mA
mA
mA
μA
dB
μA
ns
°C
V
V
V