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L6997 Scheda tecnica(PDF) 4 Page - STMicroelectronics

Il numero della parte L6997
Spiegazioni elettronici  STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS
Download  23 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6997 Scheda tecnica(HTML) 4 Page - STMicroelectronics

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L6997
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ON TIME
Ton
On time duration
VREF=VSENSE OSC=125mV
720
800
880
ns
VREF=VSENSE OSC=250mV
370
420
470
ns
VREF=VSENSE OSC=500mV
210
240
270
ns
OFF TIME
TOFFMIN
Minimum off time
600
ns
KOSC/TOFFMIN
OSC=250mV
0.3
0.33
VOLTAGE REFERENCE
VREF
Voltage Accuracy
0
µA < IREF < 100µA
0.594
0.6
0.606
V
PWM COMPARATOR
Input voltage offset
-2
+2
mV
IFB
Input Bias Current
20
nA
INTEGRATOR
INT
Over Voltage Clamp
VSENSE = VCC
0.62
0.75
0.88
V
INT
Under Voltage Clamp
VSENSE = GND
0.45
0.55
0.65
V
Integrator Input Offset Voltage
VSENSE-VREF
-4
-4
mV
IVSENSE
Input Bias Current
20
nA
GATE DRIVERS
High side rise time
VDR=3.3V; C=7nF
HGATE - PHASE from 1 to 3V
50
90
ns
High side fall time
50
100
ns
Low side rise time
VDR=3.3V; C=14nF
LGATE from 1 to 3V
50
90
ns
Low side fall time
50
90
ns
PGOOD UVP/OVP PROTECTIONS
OVP
Over voltage threshold
with respect to VREF
118
121
124
%
UVP
Under voltage threshold
67
70
73
%
PGOOD
Upper threshold
(VSENSE-VREF)
VSENSE rising
110
112
116
%
PGOOD
Lower threshold
(VSENSE-VREF)
VSENSE falling
85
88
91
%
VPGOOD
ISink=2mA
0.2
0.4
V
ELECTRICAL CHARACTERISTICS (continued)
(VCC = VDR = 3.3V; Tamb = 0°C to 85°C unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit


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