L4979D-E STMicroelectronics, L4979D-E Datasheet - Page 9

• Manufacturer Part Number: L4979D-E
• Description: IC REG PROGR WATCHDOG 8SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4979D-E

• 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 (0.236", 6.0mm Width)
• Power - Output: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Table 7.
1. When V
Table 8.
Table 9.
Pin
R
R
R
R
Pin
V
V
V
V
Pin
V
V
V
V
V
R
E
E
E
E
W
W
W
W
condition in this particular case.
es
es
es
es
cr
cr
cr
cr
cw
cw
cw
cw
cw
es
n
n
n
n
i
i
i
i
Symbol
Symbol
Symbol
V
o
R
V
V
V
V
V
I
V
V
t
T
_leak
I
I
en_hy
becomes lower than 4 V, the reset reaction time decreases down to 2 µs assuring a faster reset
t
_p_u
rr_2
en_h
o_th
I
I
t
V
V
cwc
cwd
en_l
rhth
V
whth
wop
wol
rlth
dr
rd
wlth
cr
I
ih
ih
i
Enable
Reset (continued)
Watchdog
il
Internal pull-up
resistance
Reset threshold voltage
Reset timing high
threshold
Reset timing low
threshold
Charge current
Discharge current
Reset delay time
Reset pulse delay
Input high voltage
Input low voltage
Input hysteresis
Pull down current
High threshold
Low threshold
Charge current
Discharge current
Watchdog period
Watchdog output low
time
Enable input low voltage
Enable input high
voltage
Enable input hysteresis
Pull down current
Parameter
Parameter
Parameter
Doc ID 10262 Rev 7
(1)
With respect to V
V
I
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
C
V
C
E
o
o
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
n
tw
tw
= 1 to 150 mA
= 5.6 to 31 V
= 13.5 V
= 13.5 V
= 13.5 V
= 13.5 V
= V
= 13.5 V; C
= 13.5 V
= 13.5 V
= 13.5 V
= 13.5 V
= 13.5 V
= 13.5 V
= 13.5 V; V
= 13.5 V; V
= 13.5 V;
= 13.5 V;
= 5 V
= 47 nF
= 47 nF
Test condition
Test condition
Test condition
o_th
- 100 mV
cw
cw
tr
= 1 nF
o
= 0.1 V
= 2.5 V
below
V
V
V
Min.
44%
10%
Min.
Min.
2.20
0.50
100
700
6%
3.5
1.0
o_ref
o_ref
o_ref
12
65
25
8
8
4
6
3
2
below
V
V
V
1000
47%
13%
Typ.
Typ.
2.35
0.65
Typ.
250
300
8%
7.5
2.4
o_ref
o_ref
o_ref
25
17
17
10
50
10
10
below
V
V
V
Max.
Max.
Max.
1100
10%
50%
16%
2.50
0.80
700
150
1.5
4.5
o_ref
o_ref
o_ref
50
30
30
20
14
90
22
20
1
Unit
Unit
Unit
mV
mV
ms
ms
ms
kΩ
µA
µA
µA
µA
µA
µA
µs
V
V
V
V
V
V
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