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參數(shù)資料
| 型號： | CS5155 |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | CPU 5-Bit Synchronous Buck Controller |
| 中文描述： | CPU的5位同步降壓控制器 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 279K |
| 代理商： | CS5155 |
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
4
C
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
16L SO Narrow & PDIP
1,2,3,4,6
V
ID0
D V
ID4
Voltage ID DAC input pins. These pins are internally pulled up to 5V
providing logic ones if left open. V
ID4
selects the DAC range. When V
ID4
is High (logic one), the DAC range is 2.14V to 3.54V with 100mV incre-
ments. When V
ID4
is Low (logic zero), the DAC range is 1.34V to 2.09V
with 50mV increments. V
ID0
- V
ID4
select the desired DAC output volt-
age. Leaving all 5 DAC input pins open results in a DAC output voltage
of 1.244V, allowing for adjustable output voltage, using a traditional
resistor divider.
5
SS
Soft Start Pin. A capacitor from this pin to LGnd in conjunction with
internal 60μA current source provides soft start function for the con-
troller. This pin disables fault detect function during Soft Start. When a
fault is detected, the soft start capacitor is slowly discharged by internal
2μA current source setting the time out before trying to restart the IC.
Charge/discharge current ratio of 30 sets the duty cycle for the IC when
the regulator output is shorted.
I
Soft Start (SS)
Charge Time
Pulse Period
Duty Cycle
COMP Clamp Voltage
V
FFB
SS Fault Disable
High Threshold
1.6
25
1.0
0.50
0.9
3.3
100
3.3
0.95
1.0
2.5
5.0
200
6.0
1.10
1.1
3.0
ms
ms
%
V
V
V
(Charge Time/Pulse Period)
′
100
V
FB
= 0V; V
SS
= 0
V
GATE(H)
= Low; V
GATE(L)
= Low
I
PWM Comparator
Transient Response
V
FFB
= 0 to 5V to V
GATE(H)
= 9V to 1V;
V
CC1
= V
CC2
= 12V
V
FFB
= 0V
100
125
ns
V
FFB
Bias Current
0.3
μA
I
Supply Current
I
CC1
I
CC2
Operating I
CC1
Operating I
CC2
No Switching
No Switching
V
FB
= COMP = V
FFB
V
FB
= COMP = V
FFB
8.5
1.6
8
2
13.5
3.0
13
5
mA
mA
mA
mA
I
C
OFF
Normal Charge Time
Extension Charge Time
Discharge Current
V
FFB
= 1.5V; V
SS
= 5V
V
SS
= V
FFB
= 0
C
OFF
to 5V; V
FB
>1V
1.0
5.0
5.0
1.6
8.0
2.2
11.0
μs
μs
mA
I
Time Out Timer
Time Out Time
V
FB
= V
COMP
; V
FFB
= 2V;
Record V
GATE(H)
Pulse High Duration
V
FFB
= 0V
10
30
50
μs
Fault Mode Duty Cycle
35
50
65
%
Note 1: Guaranteed by design, not 100% tested in production.
Electrical Characteristics: 0C < T
A
< +70C; 0C < T
J
< +85C; 8V < V
CC1
< 14V;5V < V
CC2
< 20V;
DAC Code: V
ID4
= V
ID2
= V
ID1
= V
ID0
= 1; V
ID3
= 0; CV
GATE(L)
and CV
GATE(H)
= 1nF; C
OFF
= 330pF; C
SS
= 0.1μF, unless otherwise specified.
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