an8049sh Panasonic Corporation of North America, an8049sh Datasheet - Page 6

• Manufacturer Part Number: an8049sh
• Description: 1.8-volt 3-channel Step-up, Step-down, And Polarity Inverting Dc-dc Converter Control Ic
• Manufacturer: Panasonic Corporation of North America

AN8049SH
I Electrical Characteristics at T
I Terminal Equivalent Circuits
6
• Design reference data (continued)
Pin No.
Short-circuit protection circuit block
Comparator threshold voltage
On/off control block
Off pin current
Note: The characteristics listed below are reference values related to the IC design and are not guaranteed.
1
2
3
Parameter
1.5 kΩ
V
2
3
CC
1
44 kΩ
46 kΩ
45 kΩ
55 kΩ
Equivalent circuit
1.1 µA
1.26 V
9 20 17
9 22 17
Latch
S
R
Symbol
a
V
Q
= 25°C (continued)
I
PWM3
PWM2
OFF
THL
Output
shutoff
V
OFF
SDH00012BEB
= 5 V
S.C.P.:
Connection for the capacitor that sets the timer
latch short-circuit protection circuit time constant.
Use a capacitor with a value of 1 000 pF or
higher.
The charge current I
DT3:
Sets the channel 3 soft start time.
Set the time by connecting a capacitor between
this pin and ground.
(See the "Application Notes, [7]" section.)
Note that although the channel 3 maximum on
duty is set internally to 86%, the maximum on
duty can be adjusted by connecting resistors
between this pin and ground, and between this
pin and the V
(See the "Application Notes, [6]" section.)
DT2:
Sets the channel 2 soft start time.
Set the time by connecting a capacitor between
this pin and ground.
(See the "Application Notes, [7]" section.)
Note that although the channel 2 maximum on
duty is set internally to 86%, the maximum on
duty can be adjusted by connecting resistors
between this pin and ground, and between this
pin and the V
(See the "Application Notes, [6]" section.)
Conditions
REF
REF
Description
pin.
pin.
CHG
is 1.1 mA typical.
Min


1.26
Typ
38
Max


Unit
I/O
µA
O
V
I
I