MAX8770GTL+T Maxim Integrated Products, MAX8770GTL+T Datasheet - Page 33

• Manufacturer Part Number: MAX8770GTL+T
• Description: IC CTLR PS 2/1PH QUICK PWM 40QFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8770GTL+T

• Applications: Controller, Intel IMVP-6
• Voltage - Input: 4 ~ 26 V
• Number Of Outputs: 1
• Voltage - Output: 0.125 ~ 1.5 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PWM Controller for IMVP-6+ CPU Core Power Supplies
When PSI is pulled low, the MAX8770/MAX8771/
MAX8772 immediately disable phase 2 (DH2 and DL2
forced low), blank PHASEGD high impedance, and enter
single-phase PWM operation (see Figure 7). When PSI is
pulled high, the MAX8770/MAX8771/MAX8772 enable
CONFIDENTIAL INFORMATION – RESTRICTED TO INTEL
Figure 7. PSI# Transition
PWM CONTROL
VID (D0–D6)
ACTIVE VID
DPRSLPVR
CPU CORE
INTERNAL
PHASEGD
VOLTAGE
DPRSTP
MAX8770/MAX8771/MAX8772 Dual-Phase, Quick-
PWRGD
CLKEN
DH1
DH2
OVP
PSI
______________________________________________________________________________________
INTERNAL
TARGET
BLANK HIGH-Z
BLANK LOW
1-PHASE SKIP (DH1 ACTIVE, DH2 = DL2 - FORCED LOW)
NO PULSES: V
DO NOT CARE (DPRSLPVR DOMINATES STATE)
SET TO 1.75V MIN
20µs TYP
t
BLANK
PSI Transitions
OUT
DEEPER SLEEP VID
> V
BLANK HIGH-Z (1-PHASE OPERATION)
TARGET
ACTUAL V
BLANK HIGH THRESHOLD ONLY
BLANK HIGH THRESHOLD ONLY
OUT
phase 2. PHASEGD is blanked high impedance for 32
switching cycles on DH2, allowing sufficient time/cycles
for phase 1 and 2 to achieve current balance. In a typical
IMVP-6 application, the VID is reduced by 1 LSB
(12.5mV) when PSI is pulled low, and increased by 1
LSB when PSI is pulled high.
SLOW SLEW RATE
SLOW SLEW RATE
TRACKS INTERNAL TARGET
LFM VID
BLANK HIGH-Z
BLANK LOW
®
1-PHASE FORCED PWM
20µs TYP
t
IMVP-6 LICENSEES
BLANK
LFM VID
DPRSLP VID
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