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| 型号： | MAX8798EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/31页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX8798 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 特殊用途 DC/DC，LCD 电源 |
| 输出及类型： | 4，非隔离 |
| 功率 - 输出： | 3.56W |
| 输出电压： | 8V，3.2V，21V，-13V |
| 电流 - 输出： | 300mA，150mA，20mA，20mA |
| 输入电压： | 1.8 ~ 6 V |
| 稳压器拓扑结构： | 升压 |
| 频率 - 开关： | 1.2MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板，CD |
| 已用 IC / 零件： | MAX8798 |
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Internal-Switch Boost Regulator with
Integrated 3-Channel Scan Driver for TFT LCDs
ABSOLUTE MAXIMUM RATINGS
IN, VL, SHDN to AGND .........................................-0.3V to +7.5V
V DD , SDA, SCL, SCLS, WPN, WPP, SET to GND...-0.3V to +4.0V
OECON, CPV, OE, STV to AGND..........................-0.3V to +4.0V
COMP, FB to AGND ......................................-0.3V to (V L + 0.3V)
DISH to GND ............................................................-6V to +2.0V
LX to PGND ............................................................-0.3V to +20V
OUT, VCOM, NEG, POS to BGND........-0.3V to (BOOST + 0.3V)
PGND, BGND, AGND to GND...............................-0.3V to +0.3V
GON to AGND ........................................................-0.3V to +50V
GOFF to AGND .............................................-30V to (V IN + 0.3V)
GON to GOFF ......................................................................+70V
CKV, CKVB, STVP, CKVCS,
CKVBCS to AGND..................(GOFF - 0.3V) to (GON + 0.3V)
LX, PGND RMS Current Rating.............................................2.4A
Continuous Power Dissipation (T A = +70°C)
NiPd Lead Frame with Nonconductive Epoxy
36-Pin, 6mm x 6mm Thin QFN
(derate 27.2mW/°C above +70°C) .........................2179.8mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
BOOST to BGND ....................................................-0.3V to +20V
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V IN = V DD = V SHDN = +3V, circuit of Figure 2, V BOOST = 8V, V GON = 23V, V GOFF = -12V, V POS = 0, V NEG = 1.5V, V OE = V CPV =
V STV = V OECON = 0, T A = 0°C to +85°C , unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER
V DD Input Voltage Range
CONDITIONS
MIN
1.8
TYP
MAX
4.0
UNITS
V
V DD Quiescent Current
V DD Undervoltage Lockout
IN Input Voltage Range
IN Quiescent Current
IN Undervoltage Lockout
V DD = 3V
V DD rising; typical hysteresis 100mV
(Note 1)
V IN = 3V, V FB = 1.5V, not switching
IN rising; typical hysteresis 100mV
1.8
4
1.3
0.04
1.4
10
1.75
6.0
0.1
1.75
μA
V
V
mA
V
Rising edge, hysteresis = 15 C
Thermal Shutdown
o
160
o
C
BOOTSTRAP LINEAR REGULATOR (VL)
VL Output Voltage
VL Undervoltage Lockout
VL Maximum Output Current
I VL = 100 μA
VL rising, typical hysteresis 200mV
V FB = 1.1V
3.15
2.4
10
3.3
2.7
3.45
3.0
V
V
mA
MAIN DC-DC CONVERTER
BOOST Supply Current
Operating Frequency
Oscillator Maximum Duty Cycle
FB Regulation Voltage
FB Load Regulation
LX not switching, no load on VL
LX switching, no load on VL
0 < I LOAD < 200mA, transient only
990
88
1.216
1.5
3
1170
92
1.235
-1
2
4
1350
96
1.254
mA
kHz
%
V
%
FB Line Regulation
FB Input Bias Current
FB Transconductance
FB Voltage Gain
FB Fault Timer Trip Threshold
LX On-Resistance
LX Leakage Current
LX Current Limit
Current-Sense Transresistance
V IN = 1.8V to 5.5V, FB to COMP
V FB = 1.25V
I = 5 μA at COMP
FB to COMP
Falling edge
I LX = 1.2A
V LX = 18V
Duty cycle = 65%
-0.15
50
70
0.96
1.6
0.25
-0.08
125
160
2400
1
150
0.01
1.9
0.42
+0.15
200
280
1.04
300
20
2.2
0.55
%/V
nA
μS
V/V
V
m
μA
A
V/A
Soft-Start Period
3
ms
2
_______________________________________________________________________________________
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