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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Adaptive Digital DC/DC PWM Controller with Auto
Compensation
ZL8101
The ZL8101 is a digital PWM controller with auto
compensation that is designed to work with either the ZL1505
MOSFET driver IC, ISL6611 Phase Doubler IC, or DrMOS type
devices. Current sharing allows multiple devices to be
connected in parallel to source loads with very high current
demands. Adaptive performance optimization algorithms
improve power conversion efficiency across the entire load
range. Zilker Labs Digital-DC™ technology enables a blend of
power conversion performance and power management
features.
The ZL8101 is designed to be a flexible building block for DC
power and can be easily adapted to designs ranging from a
single-phase power supply operating from a 4.5V input to a
multi-phase supply operating from a 12V input. The ZL8101
eliminates the need for complicated power supply managers
as well as numerous external discrete components.
Most operating features can be configured by simple
pin-strap/resistor selection or through the SMBus™ serial
interface. The ZL8101 uses the PMBus™ protocol for
communication with a host controller and the Digital-DC bus
for communication between other Zilker Labs devices.
Features
• Efficient Synchronous Buck Controller
• Adaptive Performance Optimization Algorithms
• ±1% Output Voltage Accuracy
• Auto Compensation
• Snapshot™ Parametric Capture
•I
2
C/SMBus Interface, PMBus Compatible
• Internal Non-Volatile Memory (NVM)
• Tri-State PWM Gate Outputs
• Compatible with Industry Standard DrMOS Devices
• Compatible with Intersil ISL6611 Phase Doubler
• Synchronized External Driver Control
Applications
• Servers/Storage Equipment
• Telecom/Datacom Equipment
• Power Supplies (Memory, DSP, ASIC, FPGA)
Related Literature
• AN2033 “Zilker Labs PMBus Command Set - DDC Products”
• AN2034
“Configuring Current Sharing on the ZL2004 and
ZL2006”
• AN2010
“Thermal and Layout Guidelines for Digital-DC™
Products”
FIGURE 1. EFFICIENCY vs LOAD CURRENT
OUTPUT CURRENT (A)
EFFICIENCY (%)
76
81
86
91
96
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
V
IN
= 12V
L = 0.45µH
G
H
= 1 x BSC050NE2Ls
G
L
= 2 x BSC010NE2LS
V
OUT
= 3.3V
V
OUT
= 1.0V
V
OUT
= 1.5V
V
OUT
= 1.2V
V
OUT
= 1.8V
V
OUT
= 2.5V
f
SW
= 400kHz
July 13, 2012
FN7832.1
