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)： 4/13頁
文件大小： 132K
代理商： NCP5211DR2G
NCP5211
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS
(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 2)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Error Amplifier
V
FB
Bias Current
COMP Source Current
V
FB
= 0 V
V
FB
= 0.8 V
V
FB
= 1.2 V
0.1
1.0
A
15
30
60
A
COMP SINK Current
15
30
60
A
Open Loop Gain
98
dB
Unity Gain Bandwidth
C = 0.1 F
50
kHz
PSRR @ 1.0 kHz
70
dB
Output Transconductance
32
mmho
Output Impedance
2.5
M
Reference Voltage
0.1 V < SGND < 0.1 V, COMP = V
FB
, Measure V
FB
to SGND
V
FB
= 0.8 V
V
FB
= 1.2 V
0.977
0.992
1.007
V
COMP Max Voltage
2.5
3.0
V
COMP Min Voltage
0.1
0.2
V
GATE(H) and GATE(L)
High Voltage (AC)
GATE(L),
GATE(H) 0.5 nF < C
GATE(H)
= C
GATE(L)
< 10 nF
GATE(L) or GATE(H) 0.5 nF < C
GATE(H)
; C
GATE(L)
< 10 nF
V
C
= BST = 10 V, Measure:
1.0 V < GATE(L) < 9.0 V, 1.0 V < GATE(H) < 9.0 V
V
C
0.5
BST 0.5
V
Low Voltage (AC)
0.5
V
Rise Time
40
80
ns
Fall Time
V
= BST = 10 V, Measure:
1.0 V < GATE(L) < 9.0 V, 1.0 V < GATE(H) < 9.0 V
40
80
ns
GATE(H) to GATE(L) Delay
GATE(H) < 2.0 V, GATE(L) > 2.0 V
40
70
110
ns
GATE(L) to GATE(H) Delay
GATE(L) < 2.0 V, GATE(H) > 2.0 V
40
70
110
ns
GATE(H)/(L) PullDown
Resistance to PGND
20
50
115
K
Overcurrent Protection
OVC Comparator Offset Voltage
0 V < IS+ < V
CC
, 0 V < IS < V
CC
0 V < IS+ < V
CC
0 V < IS < V
CC
54
60
66
mV
IS+ Bias Current
1.0
0.1
1.0
A
IS Bias Current
1.0
0.1
1.0
A
COMP Discharge Threshold
0.20
0.25
0.30
V
COMP Discharge Current in
OVC Fault Mode
COMP = 1.0 V
2.0
5.0
8.0
A
PWM Comparator
Transient Response
COMP = 0 1.5 V, V
FFB
, 20 mV overdrive
V
FB
= V
FFB
= 0 V; Increase COMP until GATE(H) starts switching
Duty Cycle = 90%
100
200
ns
PWM Comparator Offset
0.425
0.475
0.525
V
Artificial Ramp
40
70
100
mV
V
FFB
Bias Current
V
FFB
Input Range
Minimum Pulse Width
V
FFB
= 0 V
(Note 4)
0.1
1.0
A
1.1
V
200
ns
Oscillator
Switching Frequency
R
OSC
= 18 k
R
OSC
= 51 k
R
OSC
= 115 k
600
750
900
kHz
Switching Frequency
240
300
360
kHz
Switching Frequency
120
150
180
kHz
R
OSC
Voltage
2. Guaranteed by design. Not tested in production.
1.21
1.25
1.29
V
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