zl2106 Intersil Corporation, zl2106 Datasheet - Page 8

• Manufacturer Part Number: zl2106
• Description: 6a Digital-dc Synchronous Step-down Dc-dc Converter
• Manufacturer: Intersil Corporation

3. Pin Descriptions
Table 4. Pin Descriptions
Notes:
1. I = Input, O = Output, PWR = Power or Ground, M = Multi-mode pins.
2. The SYNC pin can be used as a logic pin, a clock input or a clock output.
15-19
20-25
Pin
10
11
12
13
14
26
1
2
3
4
5
6
7
8
9
SALRT
DGND
VTRK
SGND
PGND
Label
SYNC
VSEN
VSET
SDA
CFG
SCL
BST
SW
PG
SA
FC
SS
8
I/O, M
Type
PWR
PWR
PWR
PWR
I, M
I, M
I, M
I, M
I, M
I/O
I/O
I/O
O
O
I
I
1
2
Figure 7. ZL2106 Pin Configurations (top view)
Description
Power good. This pin transitions high 100 ms after output voltage stabilizes within
regulation band. Selectable open drain or push-pull output. Factory default is open drain.
Digital ground. Common return for digital signals. Connect to low impedance ground
plane.
Clock synchronization pin. Used to set switching frequency of internal clock or for
synchronization to external frequency reference.
Output voltage select pin. Used to set V
Serial address select pin. Used to assign unique SMBus address to each IC.
Serial clock. Connect to external host interface.
Serial data. Connect to external host interface.
Serial alert. Connect to external host interface if desired.
Loop compensation select pin. Used to set loop compensation.
Configuration pin. Used to control the SYNC pin, sequencing and enable tracking.
Soft Start pin. Used to set the ramp delay and ramp time, sets UVLO and configure
tracking.
Track sense pin. Used to track an external voltage source.
Output voltage positive feedback sensing pin.
Common return for analog signals. Connect to low impedance ground plane.
Power ground. Common return for internal switching MOSFETs. Connect to low
impedance ground plane.
Switching node (level-shift common).
Bootstrap voltage for level-shift driver (referenced to SW).
SALRT
DGND
SYNC
VSET
SDA
SCL
PG
FC
SA
1
2
3
4
5
6
7
8
9
Exposed Paddle
Connect to SGND
ZL2106
ZL2106
OUT
19
27
26
25
24
23
22
21
20
VDDP
SW
SW
PGND
BST
SW
SW
SW
SW
set-point and V
Data Sheet Revision 2/19/2009
OUT
max.
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