zl2006 Intersil Corporation, zl2006 Datasheet - Page 20

• Manufacturer Part Number: zl2006
• Description: Adaptive Digital Dc-dc Controller With Drivers And Current Sharing
• Manufacturer: Intersil Corporation

Table 16. R
The switching frequency can also be set to any value
between 200 kHz and 1.33 MHz using the I
interface. The available frequencies below 1.4 MHz are
defined by f
is 6 ≤ N ≤ 40. See Application Note AN33 for details.
If a value other than f
PMBus command, the internal circuitry will select the
valid switching frequency value that is closest to the
entered value. For example, if 810 kHz is entered, the
device will select 800 kHz (N=10).
12.1 kΩ
13.3 kΩ
14.7 kΩ
16.2 kΩ
17.8 kΩ
19.6 kΩ
21.5 kΩ
23.7 kΩ
10 kΩ
11 kΩ
R
SYNC
SYNC
SW
= 8 MHz/N, where the whole number N
Resistor Values
200 kHz
222 kHz
242 kHz
267 kHz
296 kHz
320 kHz
364 kHz
400 kHz
421 kHz
471 kHz
20
f
SW
SW
= 8 MHz/N is entered using a
26.1 kΩ
28.7 kΩ
31.6 kΩ
34.8 kΩ
38.3 kΩ
46.4 kΩ
51.1 kΩ
56.2 kΩ
68.1 kΩ
R
SYNC
Figure 15. SYNC Pin Configurations
1000 kHz
1143 kHz
1333 kHz
533 kHz
571 kHz
615 kHz
727 kHz
800 kHz
889 kHz
2
C/SMBus
f
SW
ZL2006
When multiple Zilker Labs devices are used together,
connecting the SYNC pins together will force all
devices to synchronize with each other. The CFG pin
of one device must set its SYNC pin as an output and
the remaining devices must have their SYNC pins set
as Auto Detect.
Note: The switching frequency read back using the
appropriate PMBus command will differ slightly from
the selected values in Table 16. The difference is due
to hardware quantization.
5.8 Power Train Component Selection
The ZL2006 is a synchronous buck converter that uses
external MOSFETs, inductor and capacitors to perform
the power conversion process. The proper selection of
the external components is critical for optimized
performance.
To select the appropriate external components for the
desired
requirements listed in Table 17 must be known.
performance
goals,
the
December 15, 2010
power
FN6850.1
supply