zl1505 Intersil Corporation, zl1505 Datasheet - Page 9

• Manufacturer Part Number: zl1505
• Description: Synchronous Step-down Mosfet Drivers
• Manufacturer: Intersil Corporation

4. Pin Descriptions
Table 4. Pin Descriptions
Notes:
1. I = Input, O = Output, PWR = Power or Ground.
ePad
Pin
10
1
2
3
4
5
6
7
8
9
PWMH
PWML
Label
HSEL
LSEL
GND
GND
VDD
BST
SW
GH
GL
9
Type
PWR
PWR
PWR
PWR
I/O
O
O
I
I
I
I
1
High-side gate drive current selector.
Connect to BST for maximum gate drive current;
Connect to SW for 50% of maximum gate drive current.
Output of high-side gate driver.
Connect to the gate of high-side FET.
Phase node.
Return path for high-side driver. Connect to source of high-side FET and drain of low-
side FET.
High-side PWM control input.
Low-side PWM control input.
Low-side gate drive current selector.
Connect to VDD for maximum gate drive current;
Connect to GND for 50% of maximum gate drive current.
Ground.
All signals return to this pin.
Output of low-side gate driver.
Connect to the gate of low-side FET.
Gate drive bias supply.
Connect a high quality bypass capacitor from this pin to GND.
Bootstrap supply.
Connect external capacitor to SW node.
Ground.
Figure 25. ZL1505 Pin Configurations (top view)
PWMH
PWML
HSEL
SW
GH
1
2
3
4
5
Exposed Paddle
Connect to GND
ZL1505
ZL1505
Description
10
9
8
7
6
BST
VDD
GL
GND
LSEL
Data Sheet Revision 2/18/2009
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