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參數(shù)資料
| 型號： | NCP5211DR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Low Voltage Synchronous Buck Controller |
| 中文描述： | 1 A SWITCHING CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | LEAD FREE, SOIC-14 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大?。?/td> | 132K |
| 代理商： | NCP5211DR2G |
NCP5211
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS
(continued)
(40
°
C < T
A
< 85
°
C; 40
°
C < T
J
< 125
°
C; 4.5
V < V
CC
, V
C
< 14
V; 7.0 V < BST <
20 V; C
GATE(H)
=
C
GATE(L)
= 3.3
nF; R
OSC
= 51 k; C
COMP
= 0.1 F, unless otherwise specified.) (Note 3)
Characteristic
Test Conditions
Min
Typ
Max
Unit
General Electrical Specifications
V
CC
Supply Current
COMP = 0 V (no switching)
5.0
8.0
mA
BST/V
C
Supply Current
COMP = 0 V (no switching)
2.0
3.0
mA
Start Threshold
GATE(H) Switching, COMP Charging
3.90
4.05
4.20
V
Stop Threshold
GATE(H) Not Switching, COMP Not Charging
3.75
3.90
4.05
V
Hysteresis
StartStop
100
150
200
mV
Sense Ground Current
(Note 4)
0.15
1.00
mA
3. Guaranteed by design. Not tested in production.
4. Recommended maximum operating voltage between the three grounds is 200 mV.
+
UVLO
Comparator
5.0 A
GATE(L)
GATE(H)
+
+
+
+
+
+
+
Σ
+
PGND
R
OSC
V
C
BST
R
S
Q
Q
S
R
Q
Q
Fault
Fault
PWM FF
COMP Discharge COMP
0.25 V
PWM Comparator
ART Ramp
OSC
R
OSC
0.5 V
Error Amp
1.0 V
100 % DC
Comparator
V
START
OC
Comparator
60 mV
0.8 V
UVLO
LGND
V
CC
IS
IS+
SGND
V
FB
COMP
V
FFB
Figure 2. Block Diagram
Reset Dominant
Set Dominant
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