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参数资料
| 型号： | MAX8795A+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, QCC32 |
| 封装： | 5 X 5 MM, 0.80 MM HEIGHT, LEAD FREE, MO-220WHHD-2, TQFN-32 |
| 文件页数： | 12/24页 |
| 文件大小： | 387K |
| 代理商： | MAX8795A+ |
MAX8795A
TFT-LCD DC-DC Converter with
Operational Amplifiers
2
_
__
_
A
AB
BS
SO
OL
LU
UT
TE
E M
MA
AX
XIIM
MU
UM
M R
RA
AT
TIIN
NG
GS
S
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.
IN, CTL to AGND ...................................................-0.3V to +7.5V
COMP, FB, FBP, FBN, DEL, REF to AGND ....-0.3V to (VIN + 0.3V)
PGND, BGND to AGND ......................................................±0.3V
LX to PGND ............................................................-0.3V to +20V
SUP to AGND .........................................................-0.3V to +20V
DRVP to AGND.......................................................-0.3V to +36V
POS_, NEG_, OUT_ to AGND ...................-0.3V to (VSUP + 0.3V)
DRVN to AGND ...................................(VIN - 30V) to (VIN + 0.3V)
SRC to AGND .........................................................-0.3V to +40V
COM, DRN to AGND ................................-0.3V to (VSRC + 0.3V)
DRN to COM............................................................-30V to +30V
POS_ to NEG_ RMS Current ...................................5mA (Note 1)
OUT_ Maximum Continuous Output Current....................±75mA
LX Switch Maximum Continuous RMS Current .....................1.6A
Continuous Power Dissipation (TA = +70°C)
32-Pin Thin QFN (derate 34.5mW/°C above +70°C) 2758mW
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
ELECTRICAL CHARACTERISTICS
(VIN = 3V, VMAIN = VSUP = 14V, PGND = AGND = BGND = 0, IREF = 25A, TA = 0°C to +85°C. Typical values are at TA = +25°C,
unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
IN Supply Range
VIN
(Note 2)
2.5
6.0
V
IN Undervoltage-Lockout
Threshold
VUVLO
VIN rising, typical hysteresis = 50mV
2.05
2.25
2.45
V
VFB = VFBP = 1.3V, VFBN = 0,
LX not switching
0.6
1.0
IN Quiescent Current
IIN
VFB = 1.2V, VFBP = 1.4V, VFBN = 0,
LX switching
23
mA
Duration to Trigger Fault
Condition
FB or FBP below threshold or FBN above
threshold
200
ms
TA = +25
°C to +85°C
1.238
1.250
1.262
REF Output Voltage
No external load
TA = 0
°C to +85°C
1.232
1.250
1.266
V
REF Load Regulation
0 < ILOAD < 50A
10
mV
REF Sink Current
In regulation
10
A
REF Undervoltage Lockout
Threshold
Rising edge; typical hysteresis = 160mV
1.15
V
Temperature rising
+160
Thermal Shutdown
Hysteresis
15
°C
MAIN STEP-UP REGULATOR
Output Voltage Range
VMAIN
VIN
18
V
Operating Frequency
fOSC
1000
1200
1400
kHz
Oscillator Maximum Duty Cycle
86
90
93
%
TA = +25
°C to +85°C
1.221
1.233
1.245
FB Regulation Voltage
VFB
No load
TA = 0
°C to +85°C
1.212
1.233
1.248
V
FB Fault Trip Level
VFB falling
1.10
1.14
1.17
V
FB Load Regulation
0 < IMAIN < full load, transient only
-1
%
FB Line Regulation
VIN = 2.5V to 6V
0.1
±0.4
%/ V
FB Input Bias Current
VFB = 1.233V
+100
+200
nA
Note 1: See Figure 2 for the op amp clamp structure.
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