参数资料
型号: MAX1855
厂商: Maxim Integrated Products, Inc.
元件分类: 数字信号处理
英文描述: Fixed-Point Digital Signal Processor 352-FC/CSP 0 to 0
中文描述: 高速、数字可调、同步降压型控制器,集成电压定位电路
文件页数: 4/33页
文件大小: 840K
代理商: MAX1855
M
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = +15V, V
CC
= V
DD
= 5V,
SKIP
= V
CC
, VPS = PGND,
T
A
= 0
°
C to +85
°
C
, unless otherwise noted. Typical
values are at T
A
= +25
°
C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VGATE Lower Trip Threshold
Measured at FB with respect to unloaded
output voltage, falling edge
-12.5
-10
-7.5
%
VGATE Upper Trip Threshold
Measured at FB with respect to unloaded
output voltage, rising edge
7.5
10
12.5
%
VGATE Propagation Delay
Falling edge, FB forced 2% below or above
VGATE trip threshold
1.5
μ
s
VGATE Output Low Voltage
VGATE Leakage Current
GATE DRIVERS
DH Gate Driver On-Resistance
I
SINK
= 1mA
High state, forced to 5.5V
0.4
1
V
μ
A
R
ON D H
V
BST
- V
LX
forced to 5V
High state (pullup)
Low state (pulldown)
1.3
1.5
0.5
5
5
DL Gate Driver On-Resistance
R
ON(DL)
1.7
DH Gate Driver Source/Sink
Current
I
DH
DH forced to 2.5V, V
BST
- V
LX
forced to 5V
1
A
DL Gate Drive Sink Current
DL Gate Driver Source Current
I
DL
I
DL
DL forced to 5V
DL forced to 2.5V
DL rising
DH rising
3
1
35
26
A
A
Dead-Time
ns
LOGIC AND I/O
Logic Input High Voltage
Logic Input Low Voltage
V
IH
V
IL
D0
D4,
SHDN
,
SKIP
D0
D4,
SHDN
,
SKIP
TON = V
CC
(200kHz operation)
TON = open (300kHz operation)
TON = REF (400kHz operation)
TON = GND (550kHz operation)
TON = GND or V
CC
SHDN
,
SKIP
= GND or V
CC
D0
D4 = GND
T
A
= +25
°
C
2.4
V
V
0.8
V
CC
- 0.4
3.15
1.65
3.85
2.35
0.5
3
1
10
-0.1
TON Input Levels
V
-3
-1
3
-1.5
Logic Input Current
μ
A
D0
D4 Pullup Current
SKIP
No-Fault Mode Current
5
μ
A
mA
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