MAX796 Maxim, MAX796 Datasheet - Page 4

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

Step-Down Controllers with
Synchronous Rectifier for CPU Power
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, GND = PGND = 0V, I VL = I REF = 0A, T
Note 3: All -40°C to +85°C specifications above are guaranteed by design.
4
+3.3V and +5V STEP-DOWN CONTROLLERS
FLYBACK/PWM CONTROLLER
INTERNAL REGULATOR AND REFERENCE
OSCILLATOR AND INPUTS/OUTPUTS
Input Supply Range
5V Output Voltage (CSL)
3.3V Output Voltage (CSL)
Nominal Adjustable Output
Voltage Range
Feedback Voltage
Line Regulation
Current-Limit Voltage
SECFB Regulation Setpoint
VL Output Voltage
VL Fault Lockout Voltage
VL/CSL Switchover Voltage
Reference Output Voltage
Reference Load Regulation
V+ Shutdown Current
V+ Off-State Leakage Current
Quiescent Power Consumption
Oscillator Frequency
SYNC High Pulse Width
SYNC Low Pulse Width
Oscillator Sync Range
Maximum Duty Cycle
DL On-Resistance
DH On-Resistance
_______________________________________________________________________________________
PARAMETER
0mV < (CSH - CSL) < 80mV, FB = VL, 6V < V+ < 30V,
includes line and load regulation
0mV < (CSH - CSL) < 80mV, FB = VL, 4.5V < V+ < 30V,
includes line and load regulation
External resistor divider
(CSH-CSL) = 0V
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
No external load (Note 1)
0µA < I
SHDN = 0V, V+ = 30V, CSL = 0V or 6V
FB = CSH = CSL = 6V, VL switched over to CSL
SYNC = REF
SYNC = 0V or 5V
SYNC = REF
SYNC = 0V or 5V
High or low
High or low, BST - LX = 4.5V
REF
< 100µA
A
= -40°C to +85°C for MAX79_E, unless otherwise noted.) (Note 3)
VL
CONDITIONS
< 25mA, 5.5V < V+ < 30V
-0.08
4.70
3.10
2.40
2.40
3.75
2.43
MIN
REF
250
120
250
250
210
5.0
-40
4.7
4.2
70
89
93
2.505
-100
TYP
5.10
3.35
0.04
300
150
4.8
91
96
1
1
MAX
5.40
3.56
2.60
0.06
-160
2.60
0.08
4.05
2.57
130
350
180
320
6.0
5.3
4.7
8.4
30
50
10
10
7
7
UNITS
%/V
mW
kHz
kHz
mV
mV
µA
µA
ns
ns
%
Ω
Ω
V
V
V
V
V
V
V
V
V
V