參數(shù)資料
型號： MAX1887
廠商： Maxim Integrated Products, Inc.
英文描述： Quick-PWM Slave Controllers for Multiphase, Step-Down
中文描述： Quick-PWM從控制器，用于多相、降壓型電源
文件頁數(shù)： 5/33頁
文件大?。?/td> 1018K
代理商： MAX1887
M
Quick-PWM Slave Controllers for
Multiphase, Step-Down Supplies
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, V
CC
= V
DD
= 5V, V
OUT
= V
COMP
= 1.2V, V
CM+
= V
CM-
= V
CS+
= V
CS-
= 1.2V,
SHDN
= V
CC
(MAX1897),
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 5)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Shutdown Supply Current (V
CC
)
(MAX1897, Note 3)
Measured at V
CC
;
SHDN
= GND
5
μA
CURRENT SENSING
On-Time Adjustment Range
COMP Output Current
0.42 < V
COMP
< 2.8V, V
OUT
≥
0.7V
Sink and source
-40
30
+40
%
μA
I
COMP
MAX1887
-2.0
+2.0
Current-Balance Offset
(V
CM+
- V
CM-
) -
(V
CS+
- V
CS-
), I
COMP
= 0,
-100mV
≤
(V
CM+
- V
CM-
)
≤
+100mV
MAX1897
-2.0
+2.0
mV
Current-Sense, Common-Mode
Range
CM+, CM-, CS+, CS-
-0.2
+2.0
V
V
ILIM
= 0.5V
V
ILIM
= 1V
V
ILIM
= 0.5V
V
ILIM
= 1V
47.5
97.5
-80
-160
0.2
52.5
102.5
-70
-140
0.3
Positive Current-Limit Threshold
V
C_LIM
V
CM+
- V
CM-
and
V
CS+
- V
CS-
mV
Negative Current-Limit
Threshold
V
CS+
- V
CS-
mV
ILIM Standby Threshold Voltage
FAULT PROTECTION
V
V
CC
/V
DD
Undervoltage Lockout
Threshold (Note 3)
Rising edge, hysteresis = 20mV, switching
disabled below this level
3.45
3.85
V
GATE DRIVERS
MAX1887
MAX1897
MAX1887
MAX1897
MAX1887
MAX1897
3.5
4.5
3.5
4.5
1.0
2.0
DH Gate-Driver On-Resistance
(Note 4)
R
ON D H
V
BST
- V
LX
forced to
5V
High state (pullup)
DL Gate-Driver On-Resistance
(Note 4)
R
ON(DL)
Low state (pulldown)
LOGIC
High
Low
3.0
TRIG Logic Levels
V
TRIG
350mV hysteresis
1.2
V
Logic high (V
CC
; 200kHz operation)
Open (300kHz operation)
Logic low (GND; 550kHz operation)
V
CC
- 0.4
1.5
3.1
0.5
TON Logic Levels (MAX1897)
V
TON
V
Note 1:
On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX = PGND, V
BST
= 5V, and a
500pF capacitor from DH to LX to simulate external MOSFET gate capacitance. Actual in-circuit times may be different due to
MOSFET switching speeds.
Note 2:
The trigger delay time, t
TRIG
, is measured from the time the TRIG pin transitions to time when the DL pin goes low.
Note 3:
The 20-pin MAX1897 has a separate analog PWM supply voltage input (V
CC
) and gate-driver supply input (V
DD
). For the 16-pin
MAX1887 device, the analog PWM supply voltage input and the gate-driver supply voltage input are internally connected and
named V
DD
.
Note 4:
Production testing limitations due to package handling require relaxed maximum on-resistance specifications for the MAX1897
’
s
QFN package. The MAX1887 and MAX1897 contain the same die, and the QFN package imposes no additional resistance in-
circuit.
Note 5:
Specifications to -40
°
C are guaranteed by design and not production tested.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1887EEE 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1887EEE+ 功能描述:電流型 PWM 控制器 CDMA Cellular/PCS System Power Supplies RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1887EEE+T 功能描述:電流型 PWM 控制器 CDMA Cellular/PCS System Power Supplies RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1887EEE-T 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1888EUA 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
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