参数资料
| 型号： | MAX17021EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/15页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX17021 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | * |
MAX17021 Evaluation Kit
Table 2. MAX17021 IMVP-6.5+ Output-Voltage VID DAC Codes (continued)
D6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
OUTPUT
VOLTAGE (V)
1.0000
0.9875
0.9750
0.9625
0.9500
0.9375
0.9250
0.9125
0.9000
0.8875
0.8750
0.8625
0.8500
0.8375
0.8250
0.8125
0.8000
0.7875
0.7750
0.7625
0.7500
0.7375
0.7250
0.7125
D6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
OUTPUT
VOLTAGE (V)
0.2000
0.1875
0.1750
0.1625
0.1500
0.1375
0.1250
0.1125
0.1000
0.0875
0.0750
0.0625
0.0500
0.0375
0.0250
0.0125
0
0
0
0
0
0
0
0
2) Switch SW1. When SW1 positions are off, the
MAX17021’s D0–D6 inputs are at logic 1 (connect-
ed to VDD). When SW1 positions are on, D0–D6
inputs are at logic 0 (connected to GND). The out-
put voltage can be changed during operation by
activating SW1 on and off. As shipped, the EV kit is
configured with SW1 positions set for 1.050V output
(Table 2). Refer to the MAX17021 IC data sheet for
more information.
Reduced Power-Dissipation
Voltage Positioning
The MAX17021 includes a transconductance amplifier for
adding gain to the voltage-positioning sense path. The
amplifier’s input is generated by summing the current-
sense inputs, which differentially sense the voltage
across the inductor’s DCR. The transconductance ampli-
fier’s output connects to the voltage-positioned feedback
input (FBAC), so the resistance between FBAC and V OUT
(R17) determines the voltage-positioning gain. Resistor
R17 (4.32k ? ) provides a -2.1mV/A voltage-positioning
slope at the output when all phases are active. Remote
output and ground sensing eliminate any additional
PCB voltage drops.
Dynamic Output-Voltage
Transition Experiment
This MAX17021 EV kit is set to transition the output volt-
age at 12.6mV/μs. The speed of the transition is altered
by scaling resistors R2 and R3.
During the voltage transition, watch the inductor current by
looking at the current-sense inputs with a differential scope
probe. Observe the low, well-controlled inductor current
that accompanies the voltage transition. Slew-rate control
during shutdown and startup results in well-controlled
currents in to and out of the battery (input source).
6
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