LT1577 Linear Technology, LT1577 Datasheet - Page 9

• Manufacturer Part Number: LT1577
• Description: Ultrafast Transient Response/ Low Dropout Regulators Adjustable and Fixed
• Manufacturer: Linear Technology

BLOCK
SHDN
GND
OUT
V
*V
IN
OUT
DIAGRAM
= (1 + R3/R4)V
SW1
SW2
NORMALLY
CLOSED
I1
15 A
I2
5 A
NORMALLY
OPEN
START-UP
REF
W
R3*
R4*
V
OR2
OR1
REF
R2
5k
Q6
1.21V
+
–
LT1575 Fixed Voltage
COMP1
100 A
100mV
HYSTERESIS
I3
R1
50k
Q1
Q7
Q2
D1
D2
Q3
+
ERROR AMP
–
I
LIM
COMP4
COMP2
COMP3
Q4
AMP
+
–
–
+
–
+
+
–
LT1575/LT1577
V
500mV
1V
50mV
TH2
V
V
TH3
TH1
Q5
1575/77 BD2
COMP
IPOS
GATE
INEG
9