ISL6558 Datasheet, PDF (7/16 Pages) Intersil Corporation – Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positioning

ISL6558
Electrical Specifications Operating Conditions: V_CC = 5V, T_A = -40°C to 85°C. Unless Otherwise Specified. (Continued)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
POWER GOOD MONITOR
Undervoltage Threshold
Undervoltage Threshold
PGOOD Low Output Voltage
PROTECTION
VSEN Rising
VSEN Falling
I_PGOOD = 4mA
-
0.92
-
V_REF
-
0.90
-
V_REF
- 0.18 0.4
V
Overvoltage Threshold
Percent Overvoltage Hysteresis (GNT)
VSEN Rising, ISL6558CB, ISL6558CR, T_A = 0°C to 70°C
VSEN Rising, ISL6558IB, ISL6558IR, T_A = -40°C to 85°C
VSEN Falling after Overvoltage
1.12 1.15 1.2 V_REF
1.085 1.15 1.2 V_REF
-
2
-
%
GBD = Guaranteed By Design
GNT = Guranteed Not Tesed
FB
ERROR
AMPLIFIER
-
0.8V +
CORRECTION
∑
+
-
V_ERROR1
PWM
CIRCUIT
DROOP
I_DROOP
∑
+
-
I_TOTAL
-
∑
+
CURRENT
SENSING
CURRENT
AVERAGING
CURRENT
SENSING
-
+
∑
V_ERROR2
CORRECTION
PWM
CIRCUIT
R_FB
R_OS
V_IN
PWM1
HIP6601B
Q1
L₀₁
I_L1
Q2
PHASE
ISEN1
R_ISEN1
ISEN2
R_ISEN2
PWM2
HIP6601B
V_IN
PHASE
Q3
L₀₂
I_L2
Q4
V_OUT
C_OUT R_LOAD
FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE ISL6558 VOLTAGE AND CURRENT CONTROL LOOPS CONFIGURED FOR A TWO
CHANNEL CONVERTER
7
FN9027.12
June 21, 2005