ISL6446IAZ-TK Datasheet, PDF (5/19 Pages) Intersil Corporation – Dual (180° Out-of-Phase) PWM and Linear Controller

ISL6446
Typical Application Schematics
VOLTAGE INPUTS REQUIRED
VIN (4.5V TO 24V) = VIN1 = VIN2
VCC (5V; INTERNAL IF VIN > 5.6V)
VIN3 (≤ VCC) FOR LINEAR
TYPE-3 COMPENSATION SHOWN
C₁₀₂
VOUT1
R₁₀₂ C₁₀₁
R₁₀₁
VCC
VCC
C_VCC C_VIN
VIN
OPTIONAL
CONNECTION
(FOR VIN = VCC = 5V)
R_OCSET1
VIN
VIN1 = VIN
COMP1
FB1
OCSET1
BOOT1
C_OCSET1
C_BOOT1
Q₁₀₁
C_IN1
R₁₀₃
C₁₀₃
C₂₀₂
R₁₀₀
UGATE1
PHASE1
0.9µH
L₁₀₀
VOUT1
VOUT2
R_{202 C201}
R₂₀₁
R₂₀₃ C₂₀₃
R₂₀₀
TYPE-3 COMPENSATION SHOWN
COMP2
FB2
VCC
R_PGOOD
ISL6446
LGATE1
Q₁₀₂
2x680µF/18m
2x100µF
1x47µF
R_OCSET2
VIN2 = VIN
C_OUT1
OCSET2
BOOT2
UGATE2
PHASE2
LGATE2
C_OCSET2
C_BOOT2
Q₂₀₁
C_IN2
0.9µH
L₂₀₀
Q₂₀₂
VOUT2
C_OUT2
2x680µF/18m
2x100µF
PGOOD
RT
SS1/EN1
SS2/EN2
LCDR
R₃₀₄
R₃₀₃
C₃₀₁
R₃₀₂
Q₃₀₁
VIN3
C_IN3
C_SS1/EN1 C_SS2/EN2
R_RT
SGND
PGND
LCFB
R₃₀₀
R₃₀₁
VOUT3
C_OUT3
FIGURE 4. ISL6446 TYPICAL APPLICATION
5
FN7944.1
October 15, 2013