L5991 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L5991' PDF : 23 Pages View PDF
L5991 - L5991A
ELECTRICAL CHARACTERISTICS (continued.)
Symbol
Parameter
OUTPUT SECTION
Fall Time
Rise Time
UVLO Saturation
SUPPLY SECTION
VCCON
Startup voltage
VCCOFF
Vhys
Minimum Operating
Voltage
UVLO Hysteresis
IS
Start Up Current
Iop
Operating Current
Iq
Quiescent Current
VZ
Zener Voltage
STANDBY FUNCTION
VREF-VST-BY
VT1
Standby Threshold
SYNCHRONIZATION SECTION
V1
Clock Amplitude
I1
Clock Source Current
V1
Sync Pulse
I1
Sync Pulse Current
OVER CURRENT PROTECTION
Vt
Fault Threshold Voltage
DISABLE SECTION
Shutdown threshold
Input Bias Current
IqSH
Quiescent current After
Disable
Test Condition
Min.
CO = 1nF
CO = 2.5nF
CO = 1nF
CO = 2.5nF
VCC = VC = 0 to VCCON; Isink = 10mA
L5991 14
L5991A 7.8
L5991 9
L5991A 7
L5991 4.5
L5991A 0.5
Before Turn-on at:
40
VCC = VC = VCCON -0.5V
CT = 1nF, RT = 13.3kΩ, CO =1nF
(After turn on), CT = 1nF,
RT = 13.3kΩ, CO =0nF
I8 = 20mA
21
IST-BY = 2mA
Vcomp Falling
Vcomp Rising
Master Operation
ISOURCE = 0.8mA
4
Vclock = 3.5V
3
Slave Operation
Low Level
High Level
3.5
VSYNC = 3.5V
0.5
1.1
2.4
Vpin14 = 0 to 3V
-1
VCC = 15V
Typ.
20
35
50
70
15
8.4
10
7.6
5
0.8
75
9
7.0
25
45
2.5
4.0
7
1.2
2.5
330
Max.
60
100
1.0
16
9
11
8.2
120
13
10
30
1
1.3
2.6
1
Unit
ns
ns
ns
ns
V
V
V
V
V
V
V
µA
mA
mA
V
mV
V
V
V
mA
V
V
mA
V
V
µA
µA
Figure 1. L5991 - Quiescent current vs. input
voltage.
(X = 7.6V and Y= 8.4V for L5991A)
Iq [m A]
30
20
V 14 = 0, P in2 = open
Tj = 25°C
8
6
4
0 .2
0 .1 5
0 .1
0 .0 5
0
0
4
X
Y
8
12 16 20 24 28
Vcc [V]
Figure 2. L5991 - Quiescent current vs. input
voltage (after disable).
(X = 7.6V and Y= 8.4V for L5991A)
Iq [µ A ]
350
300
250
200
150
100
50
0
0
4
V 14 = Vref
Tj = 25 °C
X
Y
8
12 16 20 24
V cc [V ]
4/23
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