参数资料
| 型号： | ISL6267HRZ |
| 厂商： | Intersil |
| 文件页数： | 22/33页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTRLR MULTIPHASE 48TQFN |
| 标准包装： | 50 |
| 系列： | Robust Ripple Regulator™ (R³) |
| 应用： | 控制器，AMD Fusion? CPU GPU |
| 输入电压： | 4.5 V ~ 25 V |
| 输出数： | 2 |
| 输出电压： | 0.013 V ~ 1.55 V |
| 工作温度： | -10°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN（6x6） |
| 包装： | 管件 |
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ISL6267
Modes of Operation
REP RATE = 10kHz
TABLE 6. CORE VR MODES OF OPERATION
OCP
THRESHOLD
PWM3
ISEN2
CONFIG.
PSL_L
MODE
(μA)
To
To Power 3-phase
1
3-phase CCM
60
REP RATE = 25kHz
External
Driver
Tied to 5V
Stage
Tied to
5V
CPU VR
Config.
2-phase
CPU VR
Config.
1-phase
CPU VR
0
1
0
X
1-phase DE
2-phase CCM
1-phase DE
1-phase DE
20
60
30
60
Config.
The Core VR can be configured for 3, 2- or 1-phase operation.
Table 6 shows Core VR configurations and operational modes,
programmed by the PWM3 and ISEN2 pin status and the PS
command. For 2-phase configuration, tie the PWM3 pin to 5V. In
this configuration, phases 1 and 2 are active. For 1-phase
configuration, tie the PWM3 pin and the ISEN2 pin to 5V. In this
configuration, only phase-1 is an active, the controller operates in
DE mode and the PSI_L input been ignored.
REP RATE = 50kHz
REP RATE = 100kHz
In 3-phase configuration, Core VR operates in 3-phase CCM, with
PSI_L high. It enters 1-phase DE mode when PSI_L is low,
dropping phases 3 and 2, and reduces the overcurrent and the
way-overcurrent protection levels to one-third of the initial values.
In 2-phase configuration, Core VR operates in 2-phase CCM with
PSI_L high. It enters 1-phase DE mode with PSI_L low, by
dropping phase 2 and reduces the overcurrent and the way
overcurrent protection levels to one-half of the initial values.
In 1-phase configuration, the Core VR operates in 1-phase DE and
ignores the PSI_L input. If a resistor is placed from COMP pin to
GND with a value less than 150k Ω , then the Core VR operates in
1-phase CCM with PSI_L high and enters 1-phase DE mode when
PSI_L is low. A resistor value of 100k Ω is recommended.
TABLE 7. NORTHBRIDGE VR MODES OF OPERATION
OCP
THRESHOLD
ISEN2_NB
To Power
Stage
Tied to 5V
CONFIG.
2-phase NB
VR Config.
1-phase NB
PSL_L
1
0
X
MODE
2-phase CCM
1-phase DE
1-phase DE
(μA)
60
30
60
VR Config.
REP RATE = 200kHz
ISL6267 Northbridge (NB) VR can be configured for 2- or 1-phase
operation. Table 7 shows the Northbridge VR configurations and
operational modes, which are programmed by the ISEN2 pin
status and the PSI_L command. For 1-phase configuration, tie
the ISEN2_NB pin to 5V. In 1-phase configuration, the
Northbridge VR operates in 1-phase DE and ignores the PSI_L
input. If a resistor is placed from COMP_NB pin to GND with a
value less than 150k Ω , then the Northbridge VR operates in 1-
FIGURE 18. CURRENT BALANCING DURING DYNAMIC
OPERATION. CH1: I L1 , CH2: I LOAD , CH3: I L2 , CH4:
I L3
22
phase CCM with PSI_L high and enters 1-phase DE mode when
PSI_L is low. A resistor value of 100k Ω is recommended.
The Northbridge VR can be disabled completely by tying
ISUMN_NB to 5V.
January 8, 2013
FN7801.1
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