MAX1536 Maxim Integrated Products, MAX1536 Datasheet - Page 11

• Manufacturer Part Number: MAX1536
• Description: 3.6A 1.4MHz Low-Voltage Internal-Switch Step-Down Regulator with Dynamic Output Voltage Control
• Manufacturer: Maxim Integrated Products

extended off-time to control the current. Operation dur-
ing a short-circuit or overload is similar to forced-PWM
mode except the off-time is 4 × t
off-time, the PMOS switch turns on and remains on until
the output is in regulation or the current through the
switch increases to the 4.8A current limit. When the
PMOS switch turns off, it remains off for four times the
programmed off-time (t
Figure 2. MAX1536 Functional Diagram
Table 2. Component Manufacturers
Coilcraft
Coiltronics
Kemet
Sanyo
Sumida
Taiyo Yuden
TDK
TOKO
Down Regulator with Dynamic Output Voltage Control
REF
SUPPLIER
REFIN
GATE
OD
OD
3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-
______________________________________________________________________________________
COMPARATOR
PGOOD
PGOOD
OFF
FBLANK
), and the NMOS synchro-
OFF
G
REF
m
. At the end of each
COMPONENT
DECODE AND
Capacitors
Capacitors
Capacitors
Capacitors
Inductors
Inductors
Inductors
Inductors
FBLANK
TIMER
2.0V
REF
COMP
AGND
FB
V
CC
COMPARATOR
SUMMING
MAX1536
TIMER
TOFF
nous switch turns on. Since either the NMOS or the
PMOS switch is always on, the inductor current is con-
tinuous. The RMS inductor current during a short circuit
remains below the 4.8A current-limit threshold. The
MAX1536 operates using the extended off-time until the
short-circuit or overload is removed and V
V
thermal shutdown.
REFIN
81-3-5201-7241 (Japan)
03-3667-3408 (Japan),
847-803-6100 (USA),
800-322-2645 (USA)
561-752-5000 (USA)
408-986-0424 (USA)
818-998-7322 (USA)
408-982-9660 (USA)
408-573-4150 (USA)
858-675-8013 (USA)
SHDN
SKIP
. Prolonged short circuit or overload can result in
PHONE
PWM LOGIC
CURRENT
CURRENT
DRIVERS
SENSE
SENSE
AND
V
CC
*FB
IN
LX
PGND
*FOR V
*FROM V
www.coilcraft.com
www.coiltronics.com
www.kemet.com
www.sanyo.com
www.sumida.com
www.t-yuden.com
www.component.tdk.com
www.toko.com
OUT
C
IN
OUT
L
> 2.0V, USE AN FB RESISTIVE DIVIDER
www.DataSheet4U.com
V
TO AGND.
IN
WEBSITE
C
OUT
FB
V
+0.7V TO V
V
+3.0V TO +5.5V
OUT
IN
> 0.3 ×
IN
11