MAX8771 查看數據表（PDF） - Maxim Integrated
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MAX8771 Datasheet PDF : 47 Pages
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CONFIDENTIAL INFORMATION – RESTRICTED TO INTEL® IMVP-6 LICENSEES
MAX8770/MAX8771/MAX8772 Dual-Phase, Quick-
PWM Controller for IMVP-6+ CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1. VDD = VCC = VSHDN = VPSI = VDPRSTP = 5V, DPRSLPVR = GNDS = PGND_ = GND, VFB = VCCI = VCSP_ = VCSN_
= 1.200V, D0–D6 set for 1.20V (D0-D6 = 0001100). TA = -40°C to +105°C, unless otherwise specified. Typical values are at TA =
+25°C.) (Note 4)
PARAMETER
PWM CONTROLLER
Input Voltage Range
DC Output Voltage Accuracy
Boot Voltage
GNDS Input Range
GNDS Gain
On-Time Accuracy (Note 3)
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VOUT
VBOOT
VGNDS
AGNDS
tON
VCC, VDD
Includes load-
regulation error
(Note 2)
DAC codes from
0.8375V to 1.500V
DAC codes from
0.500V to 0.825V
DAC codes below
0.4875V
∆VOUT/∆VGNDS, -200mV ≤ VGNDS ≤
+200mV
VIN = 12V
VFB = VCCI = 1.2V
RTON = 96.75kΩ
RTON = 200kΩ
RTON = 303.25kΩ
4.5
-0.6
-6
-15
1.182
-200
0.95
142
300
425
5.5
V
+0.6
%
+6
mV
+15
1.218
V
+200 mV
1.05
V/V
192
366
ns
575
Minimum FB and CCI Voltages
for Pseudo-Fixed-Frequency
Operation
Switching frequency is reduced if FB and/or
CCI are less than this value
0.25
V
Minimum Off-Time
tOFF(MIN) (Note 3)
RTIME = 71.5kΩ (12.5mV/µs nominal)
-10
RTIME = 35.7kΩ (25mV/µs nominal) to
178kΩ (5mV/µs nominal)
-15
375
ns
+10
+15
TIME Slew-Rate Accuracy
DPRSTP = high, DPRSLPVR = high, RTIME
= 35.7kΩ to 178kΩ, SR = 6.25mV/µs
-20
nominal to 1.25mV/µs nominal
+20
%
Startup and shutdown,
RTIME = 35.7kΩ (3.125mV/µs nominal) to
-20
178kΩ (0.625mV/µs nominal)
BIAS AND REFERENCE
Quiescent Supply Current (VCC)
ICC
Measured at VCC, FB forced above the
regulation point, DPRSLPVR = VCC
Quiescent Supply Current (VDD)
IDD
Measured at VDD, FB forced above the
regulation point, DPRSLPVR = VCC
Shutdown Supply Current (VCC) ICC(SHDN) Measured at VCC, SHDN = GND
Shutdown Supply Current (VDD) IDD(SHDN) Measured at VDD, SHDN = GND
Reference Voltage
VREF VCC = 4.5V to 5.5V, IREF = 0
1.98
Reference Load Regulation
∆VREF
IREF = 0 to 500µA
IREF = -100µA to 0
-2
+20
10
mA
1
µA
1
µA
1
µA
2.02
V
mV
6.2
_______________________________________________________________________________________ 7
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