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MAX8798 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Internal-Switch Boost Regulator - Maxim Integrated Products

भाग संख्या MAX8798
समारोह Internal-Switch Boost Regulator
मैन्युफैक्चरर्स Maxim Integrated Products 
लोगो Maxim Integrated Products लोगो 
पूर्व दर्शन
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<?=MAX8798?> डेटा पत्रक पीडीएफ

MAX8798 pdf
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
VDD, 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 (VL + 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 (VIN + 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 (TA = +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
(VIN = VDD = VSHDN = +3V, circuit of Figure 2, VBOOST = 8V, VGON = 23V, VGOFF = -12V, VPOS = 0, VNEG = 1.5V, VOE = VCPV =
VSTV = VOECON = 0, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VDD Input Voltage Range
VDD Quiescent Current
VDD = 3V
1.8 4.0 V
4 10 μA
VDD Undervoltage Lockout
IN Input Voltage Range
VDD rising; typical hysteresis 100mV
(Note 1)
1.3 1.75
1.8 6.0
V
V
IN Quiescent Current
IN Undervoltage Lockout
VIN = 3V, VFB = 1.5V, not switching
IN rising; typical hysteresis 100mV
0.04
1.4
0.1
1.75
mA
V
Thermal Shutdown
Rising edge, hysteresis = 15 oC
160 oC
BOOTSTRAP LINEAR REGULATOR (VL)
VL Output Voltage
VL Undervoltage Lockout
IVL = 100μA
VL rising, typical hysteresis 200mV
3.15 3.3 3.45
2.4 2.7 3.0
V
V
VL Maximum Output Current
VFB = 1.1V
10 mA
MAIN DC-DC CONVERTER
BOOST Supply Current
LX not switching, no load on VL
LX switching, no load on VL
1.5 2
mA
34
Operating Frequency
990 1170 1350 kHz
Oscillator Maximum Duty Cycle
88 92 96
%
FB Regulation Voltage
1.216 1.235 1.254
V
FB Load Regulation
FB Line Regulation
0 < ILOAD < 200mA, transient only
VIN = 1.8V to 5.5V, FB to COMP
-0.15
-1
-0.08 +0.15
%
%/V
FB Input Bias Current
FB Transconductance
VFB = 1.25V
I = 5μA at COMP
50 125 200 nA
70 160 280 μS
FB Voltage Gain
FB to COMP
2400
V/V
FB Fault Timer Trip Threshold Falling edge
0.96 1 1.04
V
LX On-Resistance
ILX = 1.2A
150 300
m
LX Leakage Current
LX Current Limit
VLX = 18V
Duty cycle = 65%
0.01
20
1.6 1.9 2.2
μA
A
Current-Sense Transresistance
0.25 0.42 0.55
V/A
Soft-Start Period
3 ms
2 _______________________________________________________________________________________

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डाउनलोड[ MAX8798 Datasheet.PDF ]


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