MAX798 Maxim, MAX798 Datasheet - Page 7

• Manufacturer Part Number: MAX798
• Description: High-Accuracy Step-Down Controller with Synchronous Rectifier for CPU Power
• Manufacturer: Maxim

The MAX798 contains the following seven major circuit
blocks, which are shown in Figure 2.
PWM Controller Blocks:
Figure 2. Functional Diagram
AT 100 A
ON/OFF
PWM Logic Block
+2.505V
Multi-Input PWM Comparator
Current-Sense Circuit
Gate-Driver Outputs
REF
GND
SKIP
SHDN
SS
with Synchronous Rectifier for CPU Power
4.5V
_______________________________________________________________________________________
+2.505V
REF
BATTERY VOLTAGE
High-Accuracy Step-Down Controller
1.6V
COMPARATOR
LOGIC
MAX798
PWM
PWM
CSL
TO
SHDN
REGULATOR
+5V LINEAR
1X
V+
OUT
SYNC
PGND
CSH
BST
CSL
FB
DH
Bias Generator Blocks:
VL
LX
DL
+5V Linear Regulator
Automatic Bootstrap Switchover Circuit
+2.505V Reference
+5V AT 5mA
OUTPUT
MAIN
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