zl2103 Intersil Corporation, zl2103 Datasheet - Page 3

• Manufacturer Part Number: zl2103
• Description: 3a Digital-dc Synchronous Step-down Dc/dc Converter
• Manufacturer: Intersil Corporation

Pin Configuration
Pin Descriptions
20, 21, 22,
15, 16, 17,
23, 24, 25
27, 28, 29
18, 19
PIN
11
12
13
26
30
10
14
1
2
3
4
5
6
7
8
9
LABEL
SALRT
DGND
SGND
PGND
VDDP
VDDS
SYNC
VTRK
VSEN
VSET
SDA
SCL
CFG
BST
SW
PG
SA
FC
SS
(Note 1)
(Note 2)
I/O, M
TYPE
PWR
PWR
PWR
PWR
PWR
PWR
I, M
I, M
I, M
I, M
I, M
I/O
I/O
I/O
3
O
O
I
I
Digital ground. Common return for digital signals. Connect to low impedance ground plane.
Serial clock. Connect to external host interface.
Configuration pin. Used to control the SYNC pin, sequencing and enable 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.
Bootstrap voltage for level-shift driver (referenced to SW).
Power-good. This pin transitions high 100ms after output voltage stabilizes within regulation band.
Selectable open drain or push-pull output. Factory default is open drain.
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 data. Connect to external host interface.
Serial alert. Connect to external host interface if desired.
Loop compensation select pin. Used to set loop compensation.
Soft-start pin. Used to set the ramp delay and ramp time, sets UVLO and configure tracking.
Power ground. Common return for internal switching MOSFETs. Connect to low impedance ground plane.
Switching node (level-shift common).
Bias supply voltage for internal switching MOSFETs (return is PGND).
IC supply voltage (return is SGND).
SALRT
DGND
SYNC
VSET
SDA
SCL
PG
FC
SA
1
2
3
4
5
6
7
8
9
Exposed Paddle
Connect to SGND
ZL2103
(36 LD QFN)
36-Pin QFN
ZL2103
FIGURE 4.
TOP VIEW
6 x 6 mm
ZL2103
OUT
set-point and V
27
26
21
20
19
25
24
23
22
DESCRIPTION
VDDP
BST
SW
SW
SW
SW
SW
SW
PGND
OUT
max.
May 3, 2011
FN6966.5