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参数资料
型号： MAX1858A-MAX1876A
厂商： Maxim Integrated Products, Inc.
英文描述： Dual 180∑ Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR
中文描述： 双180Σ外的多相降压控制器与排序/偏置启动和葡萄牙
文件页数： 3/22页
文件大小： 553K
代理商： MAX1858A-MAX1876A
M
Dual 180° Out-of-Phase Buck Controllers with
Sequencing/Prebias Startup and POR
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 12V, EN = ILIM_ = V
L
, SYNC = GND, I
VL
= 0mA, PGND = GND, C
REF
= 0.22μF, C
VL
= 4.7μF (ceramic), R
OSC
= 60k
,
compensation components for COMP_ are from Figure 1,
T
A
= -40
°
C to +85
°
C
(Note 1), unless otherwise noted.)
PARAMETER
CONDITIONS
Switching frequency must be set to half of the SYNC
frequency
High
SYNC Input Pulse Width
(Note 4)
Low
SYNC Rise/Fall Time
(Note 4)
ERROR AMPLIFIER
FB_ Input Bias Current
0
°
C to +85
°
C
FB_ Input Voltage Set Point
-40
°
C to +85
°
C
0
°
C to +85
°
C
FB_ to COMP_ Transconductance
-40
°
C to +85
°
C
DRIVERS
DL_, DH_ Break-Before-Make Time
C
LOAD
= 5nF
Low
DH_ On-Resistance
High
Low
DL_ On-Resistance
High
LOGIC INPUTS (EN, SYNC)
Input Low Level
Typical 15% hysteresis, V
L
= 4.5V
Input High Level
V
L
= 5.5V
Input High/Low Bias Current
V
EN
= 0 or 5.5V
LOGIC OUTPUTS (CKO)
Output Low Level
V
L
= 5V, sinking 5mA
Output High Level
V
L
= 5V, sourcing 5mA
COMP_
Pulldown Resistance During
Shutdown and Current Limit
RST
OUTPUT (MAX1858A/MAX1876A ONLY)
Both FBs must be over this to allow the reset timer to
start; there is no hysteresis
V
L
= 5V, sinking 3.2mA
Output Low Level
V
L
= 1V, sinking 0.4mA
Output Leakage
V+ = V
L
= 5V, V
RST
= 5.5V, V
FB
= 1V
Reset Timeout Period
V
FB_
= 1V
FB_ to Reset Delay
FB_ overdrive from 1V to 0.85V
MIN
TYP
MAX
UNITS
SYNC Range
200
1200
kHz
100
100
ns
100
ns
250
1.015
1.02
2.70
2.9
nA
0.985
0.98
1.25
1.2
1.00
1.00
1.8
1.8
V
mS
30
1.5
3
0.6
3
ns
2.5
5
1.5
5
0.8
+1
V
V
μA
2.4
-1
+0.1
0.4
V
V
4.0
17
Output-Voltage Trip Level
0.87
0.9
0.93
V
0.4
0.3
1
560
V
μA
ms
μs
140
315
4
Note 1:
Specifications to -40
°
C are guaranteed by design and not production tested.
Note 2:
Operating supply range is guaranteed by V
L
line regulation test. Connect V+ to V
L
for 5V operation.
Note 3:
When V
L
falls and UVLO is tripped, the device is latched and V
L
must be discharged below 2.5V before normal operation
can resume.
Note 4:
Guaranteed by design and not production tested.
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