MAX798 データシートの表示（PDF） - Maxim Integrated
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MAX798 Datasheet PDF : 12 Pages
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High-Accuracy Step-Down Controller
with Synchronous Rectifier for CPU Power
ABSOLUTE MAXIMUM RATINGS
V+ to GND .................................................................-0.3V, +36V
GND to PGND........................................................................±2V
VL to GND ...................................................................-0.3V, +7V
BST to GND ...............................................................-0.3V, +36V
DH to LX ........................................................-0.3V, (BST + 0.3V)
LX to BST.....................................................................-7V, +0.3V
SHDN to GND............................................................-0.3V, +36V
SYNC, SS, REF, SKIP, DL to GND ...................-0.3V, (VL + 0.3V)
CSH, CSL to GND .......................................................-0.3V, +7V
VL Short Circuit to GND..............................................Momentary
REF Short Circuit to GND ...........................................Continuous
VL Output Current ...............................................................50mA
Continuous Power Dissipation (TA = +70°C)
SO (derate 8.70mW/°C above +70°C) ........................696mW
Operating Temperature Range
MAX798ESE....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
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+ = +15V, GND = PGND = 0V, IVL = IREF = 0A, TA = 0°C to +85°C, unless otherwise noted.)
PARAMETER
STEP-DOWN CONTROLLER
Input Supply Range
CONDITIONS
Nominal Adjustable Output
Voltage Range
External resistor divider
Feedback Voltage
CSH - CSL = 40mV, SKIP = VL
Load Regulation
0mV < (CSH - CSL) < 80mV, SKIP = VL
Line Regulation
6V < V+ < 30V
Current-Limit Voltage
CSH - CSL, positive
CSH - CSL, negative
SS Source Current
SS Fault Sink Current
INTERNAL REGULATOR AND REFERENCE
VL Output Voltage
SHDN = 2V, 0mA <IVL < 25mA, 5.5V < V+ < 30V
VL Fault Lockout Voltage
Rising edge, hysteresis = 15mV
VL/CSL Switchover Voltage
Rising edge, hysteresis = 25mV
Reference Output Voltage
No external load (Note 1)
Reference Fault Lockout Voltage Falling edge
Reference Load Regulation
0µA < IREF < 100µA
CSL Shutdown Leakage Current SHDN = 0V, CSL = 6V, V+ = 0V or 30V, VL = 0V
V+ Shutdown Current
SHDN = 0V, V+ = 30V, CSL = 0V or 6V
V+ Off-State Leakage Current FB = CSH = CSL = 6V, VL switched over to CSL
Dropout Power Consumption V+ = 4V, CSL = 0V (Note 2)
Quiescent Power Consumption CSH = CSL = 6V
MIN
4.5
1.6
1.576
80
-40
2.0
2.0
4.75
3.8
4.2
2.463
1.8
TYP
1.6
0.04
100
-100
4.0
2.505
0.1
1
1
6.6
6.4
MAX UNITS
30
V
6
V
1.624
V
±0.4
%
0.05 %/V
120
mV
-160
6.5
µA
mA
5.25
V
4.0
V
4.7
V
2.537
V
2.3
V
20
mV
1
µA
5
µA
5
µA
10.5 mW
8.5
mW
2 _______________________________________________________________________________________
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