AS1336 austriamicrosystems, AS1336 Datasheet - Page 10

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

AS1336
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS1336 is a dual synchronous boost converter and can operate from a single-cell input voltage (V
and features fixed frequency (1.2MHz) and current mode PWM control for exceptional line- and load-regulation. With
low R
heavy loads.
Figure 26. AS1336 - Block Diagram
www.austriamicrosystems.com/DC-DC_Step-Up/AS1336
DS(ON)
and gate charge internal NMOS and PMOS switches, the device maintains high-efficiency from light to
EN1
EN2
LX1
LX2
VIN
LBI
15
13
11
8
4
7
Powersave
Powersave
Shutdown
Shutdown
Control
Control
1.2MHz Ramp
Generator
Powersave
Powersave
Comp
Comp
PWM
Operation
PWM
Operation
OSC2
SLP1
OSC2
SLP2
Control
Control
+
–
–
+
–
–
SLP1
SLP2
OSC1
OSC2
Control
Control
Compensator
Compensator
Start Up1
Start Up2
PWM
PWM
Slope
Slope
Revision 1.01
Loop Filter
Loop Filter
AS1336
A
B
A
B
Sync Drive
Sync Drive
Control
Control
MUX
MUX
A/B
A/B
Start Up
1.23V
Ref
Σ
Σ
OSC
REF1
REF2
Start Up2
Start Up1
g
g
0.25Ω
m
0.25Ω
m
Amp
Amp
Current
Sense
Current
Sense
Error
Error
Converter 1
–
+
–
+
Converter 2
Good
Good
V
V
OUT
OUT
REF1
REF2
0.35Ω
0.35Ω
shared
–
+
–
+
2.3V
2.3V
3
FB1
9
FB2
10
LBO
14
PGND
12
VOUT1
5
MODE1
1
GND
12
VOUT2
6
MODE2
2
GND
IN
) below 0.8V,
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