AS1336 austriamicrosystems, AS1336 Datasheet - Page 2

• Manufacturer Part Number: AS1336
• Description: Dual, Low Voltage, Micropower Dc-dc Step-up Converters
• Manufacturer: austriamicrosystems

AS1336
Datasheet - P i n A s s i g n m e n t s
4 Pin Assignments
Figure 2. Pin Assignments (Top View)
Pin Descriptions
www.austriamicrosystems.com/DC-DC_Step-Up/AS1336
Table 1. Pin Descriptions
Pin Name
MODE1
MODE2
VOUT2
GND
EN1
EN2
LBO
FB1
FB2
VIN
LBI
Pin Number
1, 2
10
12
11
3
4
5
6
7
8
9
Signal Ground. These pins are used as a ground reference.
Feedback Pin. Feedback input to the g
divider tap to this pin. The output voltage can be adjusted from 1.8V to 3.6V
by: V
Enable Pin. Logic controlled shutdown input.
1 = Normal operation, 1.2MHz typical operating frequency.
0 = Shutdown; quiescent current <2µA.
The EN1 pin is connected to GND via an internal pull-down resistor.
Mode Pin. Logic-controlled mode input for automatic powersave operation of
regulator 1.
1 = Fixed frequency operation.
0 = Automatic powersave operation;
Mode Pin. Logic-controlled mode input for automatic powersave operation of
regulator 2.
1 = Fixed frequency operation.
0 = Automatic powersave operation;
Enable Pin. Logic controlled shutdown input.
1 = Normal operation, 1.2MHz typical operating frequency.
0 = Shutdown; quiescent current <2µA.
The EN2 pin is connected to GND via an internal pull-down resistor.
Low Battery Comperator Input. May not be left floating, should be con-
nected to GND if it is not used. 0.6V Threshold.
Feedback Pin. Feedback input to the g
divider tap to this pin. The output voltage can be adjusted from 1.8V to 3.6V
by: V
Low Battery Comperator Output. This output is low when the voltage on
LBI is less than 0.6V. The logic level is not valid in shutdown and during
startup.
Battery Voltage Input
Output Voltage Sense Input and Drain of the Internal PMOS
Synchronous Rectifier. Bias is derived from V
V
as short and wide as is practical.
GND 1
GND 2
IN
EN1 4
FB1 3
. PCB trace length from V
OUT
OUT
= 0.8V[1 + (R
= 0.8V[1 + (R
16
5
AS1336
15
PGND
6
Revision 1.01
14
7
17
13
8
12
10
1
1
11
9
/R
/R
VOUT2
VIN
LBO
FB2
2
2
)]
)]
OUT
Description
2 to the output filter capacitor(s) should be
m
m
error amplifier. Connect a resistor
error amplifier. Connect a resistor
OUT
2 when V
OUT
2 exceeds
2 - 18