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UC27221 데이터시트(PDF) 3 Page - Texas Instruments

부품명 UC27221
상세설명  HIGH-EFFICIENCY PREDICTIVE SYNCHRONOUS BUCK DRIVER
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UCC27221
UCC27222
SLUS486B − AUGUST 2001 − REVISED JULY 2003
3
www.ti.com
ELECTRICAL CHARACTERISTICS
VDD = 12-V, 1-µF capacitor from VDD to GND, 1-µF capacitor from VHI to SW, 0.1-µF and 2.2-µF capacitor from PVLO to PGND, PVLO tied to
VLO, TA = −40_C to 105_C for the UCC2722x, TA = TJ (unless otherwise noted)
VLO regulator
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDD = 12 V,
IVLO = 0 mA
6.2
6.5
6.8
Regulator output voltage
VDD = 20 V,
IVLO = 0 mA
6.2
6.5
6.8
V
Regulator output voltage
VDD = 8.5 V,
IVLO = 100 mA
6.1
6.5
6.9
V
Line Regulation
VDD = 12 V to 20 V
2
10
mV
Load Regulation
IVLO = 0 mA to 100 mA
15
40
mV
Short-circuit current(1)
VDD = 8.5 V
220
mA
Dropout voltage, (VDD at 5% VLO drop)
VLO = 6.175 V,
IVLO = 100 mA
7.1
7.8
8.5
V
undervoltage lockout
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Start threshold voltage
Measured at VLO
3.30
3.82
4.40
Minimum operating voltage after start
3.15
3.70
4.25
V
Hysteresis
0.07
0.12
0.20
V
bias currents
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VLO bias current at VLO (ON), 5 V applications only
VLO = 4.5 V,
VDD = no connect
3.6
4.7
5.8
VDD bias current
VDD = 8.5 V
5.5
7.1
8.5
mA
VDD bias current
fIN = 500 kHz,
No load on G1/G2
5.5
10
20
mA
input command (IN)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
High-level input voltage
10 V < VDD < 20 V
3.3
3.6
3.9
V
Low-level input voltage
10 V < VDD < 20 V
2.2
2.5
2.8
V
Input bias current
VDD = 15 V
1
µA
input (SWS)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
High-level input threshold voltage
fIN = 500 kHz,
tON, G2 maximum,
G2S = 0.0 V
1.4
2.0
2.6
V
Low-level input threshold voltage
fIN = 500 kHz,
tON, G2 minimum,
G2S = 0.0 V
0.7
1.0
1.3
V
Low-level input threshold voltage
fIN = 500 kHz,
tON, G1 minimum
−100
−300
−500
mV
Input bias current
SWS = 0.0 V
−0.9
−1.2
−1.5
mA
input (G2S)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
High-level input voltage
fIN = 500 kHz,
tON, G2 maximum,
SWS = 0.0 V
1.4
2.0
2.6
V
Low-level input voltage
fIN = 500 kHz,
tON, G2 minimum,
SWS = 0.0 V
0.7
1.0
1.3
V
Input bias current
G2S = 0 V
−370
−470
−570
µA
NOTE 1: Ensured by design. Not production tested.
UCC27221
Not Recommended For New Designs


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