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Dual-Phase, Quick-PWM Controller
for IMVP6+ CPU Core Power Supplies
Pin Description (continued)
PIN
NAME
FUNCTION
14
OUTS
Output Remote Sense. Internally shorted to VPS through a 10
voltage feedback input to the power monitor.
resistance. OUTS is also the
Feedback Remote-Sense Input, Negative Side. Normally connected to GND directly at the load.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
GNDS
CCI
CSN2
CSN1
CSPAVG
IN
GND
V CC
CSP2
CSP1
N.C.
BST2
DH2
LX2
PGND2
DL2
V DD
GNDS internally connects to a transconductance amplifier that fine tunes the output voltage—
compensating for voltage drops from the regulator ground to the load ground.
Current-Balance Compensation. Connect a 470pF capacitor between CCI and the positive side of the
feedback remote-sense input (or between CCI and GND). CCI is internally forced low in shutdown.
Negative Input of the Output Current Sense of Phase 2. This pin should be connected to the
negative side of the output current-sensing resistor or the filtering capacitor if the DC resistance of
the output inductor is utilized for current sensing.
Negative Input of the Output Current Sense of Phase 1. This pin should be connected to the
negative side of the output current-sensing resistor or the filtering capacitor if the DC resistance of
the output inductor is utilized for current sensing.
Positive Input of the Output Current-Sense Averaging Network. This input should be connected to the
positive current-sense averaging network (see the standard 2-phase IMVP6+ application circuit of
Figure 1) and is utilized for load line control and power monitoring (input of the transconductance
amplifiers used for FB and PMON).
Input Sense for On-Time Control. An internal resistor sets the switching frequency to 300kHz per
phase. IN is high impedance in shutdown.
Analog Ground Connect
Controller Supply Voltage. Connect to a 4.5V to 5.5V source. Bypass to GND with 1 μF minimum.
Positive Input of the Output Current Sense of Phase 2. This pin should be connected to the positive
side of the output current-sensing resistor, or to the filtering capacitor if the DC resistance of the output
inductor is used for current sensing. This pin is utilized for current limit and current balance only.
Connect CSP2 to V CC to disable phase 2 and use the MAX17410 as a single-phase controller. In
this configuration, connect LX2 to GND, connect BST2 to V DD , CSN2 to CSN1, and float DH2, DL2,
CCI, and PHASEGD.
Positive Input of the Output Current Sense of Phase 1. This pin should be connected to the positive
side of the output current-sensing resistor, or to the filtering capacitor if the DC resistance of the output
inductor is used for current sensing. This pin is utilized for current limit and current balance only.
No Connection. Not internally connected.
Phase 2 Boost Flying Capacitor Connection. BST2 is the internal upper supply rail for the DH2
high-side gate driver. An internal switch between V DD and BST2 charges the BST2 - LX2 flying
capacitor while the low-side MOSFET is on (DL2 pulled high).
Phase 2 High-Side Gate-Driver Output. DH2 swings from LX2 to BST2. Low in shutdown.
Phase 2 Inductor Connection. LX2 is the internal lower supply rail for the DH2 high-side gate driver.
Also used as an input to phase 2 ’s zero-crossing comparator.
Power Ground. PGND2 is the internal lower supply rail for the DL2 low-side gate driver.
Phase 2 Low-Side Gate-Driver Output. DL2 swings from PGND2 to V DD . DL2 is forced low in
shutdown. DL2 is forced high when an output overvoltage fault is detected, overriding any
negative current-limit condition that might be present. DL2 is forced low in skip mode after
detecting an inductor current zero crossing.
Supply Voltage Input for the DL_ Drivers. V DD is also the supply voltage used to internally recharge
the BST_ - LX_ flying capacitor during the times the respective DL_ are high. Connect V DD to the
4.5V to 5.5V system supply voltage. Bypass V DD to GND with a 1μF or greater ceramic capacitor.
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17
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制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: