MAX796 Maxim, MAX796 Datasheet - Page 2

• Manufacturer Part Number: MAX796
• Description: Step-Down Controllers with Synchronous Rectifier for CPU Power
• Manufacturer: Maxim

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, FB, SECFB, 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
ELECTRICAL CHARACTERISTICS
(V+ = 15V, GND = PGND = 0V, I VL = I REF = 0A, T
T
Step-Down Controllers with
Synchronous Rectifier for CPU Power
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.
2
A
+3.3V AND +5V STEP-DOWN CONTROLLERS
FLYBACK/PWM CONTROLLER
INTERNAL REGULATOR AND REFERENCE
Input Supply Range
5V Output Voltage (CSL)
3.3V Output Voltage (CSL)
Nominal Adjustable Output
Voltage Range
Feedback Voltage
Load Regulation
Line Regulation
Current-Limit Voltage
SS Source Current
SS Fault Sink Current
SECFB Regulation Setpoint
VL Output Voltage
VL Fault Lockout Voltage
VL/CSL Switchover Voltage
= -55°C to +125°C for MAX79_M, unless otherwise noted.)
_______________________________________________________________________________________
PARAMETER
0mV < (CSH-CSL) < 80mV, FB = VL, 6V < V+ < 30V,
includes line and load regulation
0mV < (CSH-CSL) < 80mV, FB = 0V, 4.5V < V+ < 30V,
includes line and load regulation
External resistor divider
(CSH-CSL) = 0V
0mV < (CSH-CSL) < 80mV
25mV < (CSH-CSL) < 80mV
6V < V+ < 30V
CSH-CSL, positive
CSH-CSL, negative
Falling edge, hysteresis = 15mV (MAX796)
Falling edge, hysteresis = 20mV (MAX799)
SHDN = 2V, 0mA < I
Rising edge, hysteresis = 15mV
Rising edge, hysteresis = 25mV
VL
CONDITIONS
A
< 25mA, 5.5V < V+ < 30V
= 0°C to +70°C for MAX79_C, T
MAX79_C
MAX79_E/M
VL Output Current ...............................................................50mA
Continuous Power Dissipation (T
Operating Temperature Ranges
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
SO (derate 8.70mW/°C above +70°C) ........................696mW
Plastic DIP (derate 10.53mW/°C above +70°C) .........842mW
CERDIP (derate 10.00mW/°C above +70°C) ..............800mW
MAX79_C_ _ ......................................................0°C to +70°C
MAX79_E_ _....................................................-40°C to +85°C
MAX79_MJE .................................................-55°C to +125°C
A
-0.05
4.85
3.20
2.43
2.45
MIN
REF
= 0°C to +85°C for MAX79_E,
4.5
5.0
-50
2.5
2.0
4.7
3.8
4.2
80
A
= +70°C)
2.505
2.505
-100
TYP
5.10
3.35
0.04
100
2.5
1.5
4.0
0
MAX
5.25
3.46
2.57
0.06
-160
2.55
0.05
120
6.5
5.3
4.1
4.7
30
30
6
UNITS
%/V
mV
mA
µA
%
V
V
V
V
V
V
V
V
V