L4979D STMicroelectronics, L4979D Datasheet - Page 4

• Manufacturer Part Number: L4979D
• Description: IC VOLTAGE REG LDO SO-8
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4979D

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 150mA
• Voltage - Input: 5.6 ~ 31 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Polarity: Positive
• Input Voltage Max: 31 V
• Output Voltage: 5 V
• Output Type: Fixed
• Dropout Voltage (max): 0.4 V at 150 mA
• Output Current: 300 mA
• Line Regulation: 25 mV
• Load Regulation: 25 mV
• Voltage Regulation Accuracy: 2 %
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L4979MD L4979D
Table 5: Electrical Characteristics (continued)
4/10
VOLTAGE REGULATOR
RESET
WATCHDOG
V
V
V
Pin
R
R
R
R
R
R
V
V
V
V
V
V
s
s
s
W
W
W
W
V
V
V
V
, V
, V
, V
cw
cw
es
es
es
es
es
es
cr
cr
cr
cr
o
o
o
o
i
i
i
i
o
o
o
Symbol
R
V
V
I
V
V
V
I
SVR
V
V
V
V
res_h
t
V
short
o_ref
I
V
V
rr_2
res_l
_p_u
o_th
I
I
t
V
whth
load
lim
rhth
wlth
line
rlth
cr
dr
rd
I
dp
ih
ih
i
il
Output voltage
Output short circuit current
Output current limitation
Line regulation voltage
Load regulation voltage
Drop voltage
Ripple rejection
Reset output low voltage
Reset output high leakage
current
Internal Pull up resistance
Reset threshold voltage
Reset timing high threshold
Reset timing low threshold
Charge current
Discharge current
Reset delay time (3)
Reset pulse delay
Input high voltage
Input low voltage
Input hysteresis
Pull down current
High threshold
Low threshold
Parameter
(2)
(1)
(1)
V
I
V
V
V
I
I
I
f
R
Vo > 1V
V
with respect to V
V
I
V
V
V
V
Vo = V
V
V
V
V
V
V
V
o
o
o
o
r
o
s
s
s
s
res
s
s
s
s
s
s
s
s
s
s
s
s
ext
= 100 Hz
= 1 to 150mA
= 1 to 150mA
= 1 to 150mA
= 150mA
= 1 to 150mA
= 5.6 to 31V
= 13.5V
= 13.5V
= 5.6 to 31V
= 5.6 to 31V
= 13.5V
= 13.5V
= 13.5V
= 13.5V
= 13.5V, C
= 13.5V
= 13.5V
= 13.5V
= 13.5V
= 13.5V
= 13.5V
= 5kΩ to Vo,
= 5V
Test Condition
o_th
-100mV
tr
= 1nF
o
below
V
V
V
Min.
44%
10%
4.90
2.20
0.50
150
150
100
6%
3.5
o_ref
o_ref
o_ref
55
12
65
8
8
below
V
V
V
Typ.
5.00
47%
13%
2.35
0.65
250
280
320
200
300
8%
o_ref
o_ref
o_ref
25
17
17
10
below
V
V
V
Max.
5.10
10%
50%
16%
2.50
0.80
400
500
400
700
150
0.4
1.5
25
o_ref
o_ref
o_ref
25
50
30
30
20
1
Unit
mA
mA
mV
mV
mV
mV
kΩ
ms
dB
µA
µA
µA
µA
µs
V
V
V
V
V
V