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參數(shù)資料
| 型號： | NCP5423 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Dual Out−of−Phase Synchronous Buck Controller with Current Limit |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 171K |
| 代理商： | NCP5423 |
NCP5422A, NCP5423
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS
(0
°
C < T
A
< 70
°
C; 0
°
C < T
J
< 125
°
C; R
OSC
= 30.9 k, C
COMP1,2
= 0.1 F,
10.8
V < V
CC
< 13.2
V;
10.8
V < BST
< 20
V, C
GATE(H)1,2
=
C
GATE(L)1,2
= 1.0
nF, unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Error Amplifier
V
FB1(2)
Bias Current
V
FB1(2)
= 0 V
0.5
1.6
A
V
FB1(2)
Input Range
0
1.1
V
COMP1,2 Source Current
COMP1,2 = 1.2 V to 2.5 V; V
FB1(2)
= 0.8 V
15
30
60
A
COMP1,2 Sink Current
COMP1,2 = 1.2 V; V
FB1(2)
= 1.2 V
15
30
60
A
Reference Voltage 1(2)
NCP5422A
COMP1 = V
FB1
; COMP2 = V
FB2
0.980
1.000
1.020
V
Reference Voltage 1(2)
NCP5423
COMP1 = V
FB1
; COMP2 = V
FB2
0.990
1.000
1.010
V
COMP1,2 Max Voltage
V
FB1(2)
= 0.8 V
3.0
3.3
V
COMP1,2 Min Voltage
V
FB1(2)
= 1.2 V
0.25
0.35
V
Open Loop Gain
95
dB
Unity Gain Band Width
40
kHz
PSRR @ 1.0 kHz
70
dB
Transconductance
32
mmho
Output Impedance
2.5
M
GATE(H) and GATE(L)
High Voltage (AC)
Measure: V
CC
GATE(L)1, 2;
BST GATE(H)1,2; Note 2
0
0.5
V
Low Voltage (AC)
Measure:GATE(L)1,2 or GATE(H)1, 2; Note 2
0
0.5
V
Rise Time
1.0 V < GATE(L)1,2 < V
1.0 V
1.0 V < GATE(H)1,2 < BST 1.0 V,
BST
≤
14 V
20
50
ns
Fall Time
V
CC
1.0 > GATE(L)1,2 > 1.0 V
BST 1.0 > GATE(H)1,2 > 1.0 V,
BST
≤
14 V
15
50
ns
GATE(H) to GATE(L) Delay
GATE(H)1,2 < 2.0 V, GATE(L)1,2 > 2.0 V
BST
≤
14 V
20
40
70
ns
GATE(L) to GATE(H) Delay
GATE(L)1,2 < 2.0 V, GATE(H)1,2 > 2.0 V;
BST
≤
14 V
20
40
70
ns
GATE(H)1(2) and GATE(L)1(2) pulldown
Resistance to GND
Note 2
50
125
280
k
PWM Comparator
PWM Comparator Offset
V
= 0 V; Increase COMP1,2 until
GATE(H)1,2 starts switching
0.30
0.425
0.55
V
Artificial Ramp
Duty cycle = 50%, Note 2
40
70
100
mV
Minimum Pulse Width
Note 2
300
ns
Oscillator
Switching Frequency
R
OSC
= 61.9 k; Measure GATE(H)1; Note 2
112
150
188
kHz
Switching Frequency
R
OSC
= 30.9 k; Measure GATE(H)1
250
300
350
kHz
Switching Frequency
R
OSC
= 15.1 k; Measure GATE(H)1; Note 2
450
600
750
kHz
R
OSC
Voltage
R
OSC
= 30.9 k, Note 2
0.970
1.000
1.030
V
Phase Difference
180
°
2. Guaranteed by design, not 100% tested in production.
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