参数资料
型号: ISL6532AEVAL1
厂商: Intersil
文件页数: 3/9页
文件大小: 0K
描述: EVALUATION BOARD 1 ISL6532A
标准包装: 1
主要目的: 特殊用途 DC/DC,DDR 存储器电源
输出及类型: 3,非隔离
输出电压: 1.25V,1.5V,2.5V
输入电压: 5V,12V
稳压器拓扑结构: 降压
频率 - 开关: 250kHz
板类型: 完全填充
已供物品:
已用 IC / 零件: ISL6532A
Application Note 1056
Shutdown to Active State Transition
Figure 4 shows the transition from Shutdown to Active. Refer
to Table 1 for proper switch positions to achieve this state
transition.
2.480V
V DDQ
50mV/DIV
V TT
50mV/DIV
1.230V
S5
5VATX
12VATX
V DDQ
V AGP
1.480V
V DDQ Load
10A/DIV
200 μ s/DIV
V AGP
50mV/DIV
PGOOD
10ms/DIV
V TT
FIGURE 6. TRANSIENT ON V DDQ
5VATX @ 1V/DIV
12VATX @ 3V/DIV
PGOOD @ 5V/DIV
V DDQ @ 1V/DIV
V AGP @ 1V/DIV
V TT @ 1V/DIV
2.480V
V DDQ
10mV/DIV
FIGURE 4. SHUTDOWN TO ACTIVE TRANSITION
V DDQ Ripple Voltage
Figure 5 shows the ripple voltage on the V DDQ output.
1.230V
1.480V
V TT
10mV/DIV
V AGP
10mV/DIV
V TT Load
1A/DIV
V DDQ
10mV/DIV
2 μ s/DIV
2.480V
200 μ s/DIV
FIGURE 7. SOURCING TRANSIENT ON V TT
V DDQ
50mV/DIV
V TT
FIGURE 5. V DDQ RIPPLE VOLTAGE
Transient Performance
Figures 6 through 10 show the response of the outputs when
subjected to a variety of transient loads while in the Active
(S0) State. Figure 6 shows V DDQ under transient loading.
Figure 7 shows V TT under a transient loading that causes
1.230V
1.480V
20mV/DIV
V AGP
50mV/DIV
V TT to source current. Figure 8 shows V TT under a transient
that causes V TT to sink current. Figure 9 shows both V DDQ
and V TT under simultaneous transient loading. Finally,
500 μ s/DIV
V TT Load
1A/DIV
Figure 10 shows the 1.5V AGP rail under transient loading.
3
FIGURE 8. SINKING TRANSIENT ON V TT
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