參數(shù)資料
型號(hào): AS1326B-BTDT
廠商: AUSTRIAMICROSYSTEMS AG
元件分類: DC/DC變換器
英文描述: Adj. 650mA, 1MHz, Boost; Package Type: TDFN(3x3)-10; Miscellaneous: Logic-High On
中文描述: 高電流0.8A的DC - DC升壓轉(zhuǎn)換器
封裝: TDFN(3x3)-10
文件頁(yè)數(shù): 1/18頁(yè)
文件大小: 1108K
代理商: AS1326B-BTDT
AS1326
High Current, 0.8A DC-DC Step-Up Converters
www.austriamicrosystems.com
Revision 1.05
1 - 18
Datasheet
1 General Description
The AS1326A/AS1326B are high-efficiency, high cur-
rent, DC-DC step-up converters specifically designed for
battery-powered wireless applications. Low quiescent
supply current (65μA), high operating frequency (1MHz),
and minimal external component requirements make
these devices perfect for small hand-held applications.
Table 1. Standard Products
Both devices use synchronous-rectified pulse-width
modulation (PWM) boost technology to generate 2.5 to
5.0V outputs from a wide range of inputs, such as 1 to 3
alkaline/NiCd/NiMH cells or a single lithium-ion (Li+)
cell. Automatic powersave operation significantly
improves efficiency at light-loads.
Continuous switching mode is available for applications
requiring constant-frequency operation at all load cur-
rents. PWM operation can also be synchronized to an
external clock to protect sensitive frequency bands in
communications equipment.
Analog soft-start and adjustable current limit permit opti-
mization of rush in current and external component size.
The AS1326A/AS1326B are available in a 10-pin TDFN
(3.0mm x 3.0mm) package.
Figure 1. AS1326 - Block Diagram
2 Key Features
!
Up to 800mA Output
!
Constant-Frequency (1MHz) Operation
!
Up to 96% Efficiency
!
Input Range: 0.7 to 5.0V
!
Fixed Output: 3.3V
!
Adjustable Output: 2.5 to 5.0V
!
PWM Synchronous-Rectified Technology
!
Logic-Controlled Shutdown: 0.1μA
!
Synchronizable Switching Frequency
(0.5 to 1.2MHz)
!
Adjustable Current Limit
!
Adjustable Soft-Start
!
10-pin TDFN (3.0mm x 3.0mm) Package
3 Applications
The devices are ideal for digital cordless phones. mobile
phones, wireless handsets, hand-held instruments,
PDAs, two-way pagers, and any battery-operated equip-
ment.
Model
Input Signal Activation
AS1326A
Logic-Low On
AS1326B
Logic-High On
AS1326
+
Reference
Ref
Startup
Osc
Controller
On
GND
Rdy
1MHz Osc
CLK/SEL Mode
En
Osc
On
Q
D
En
Osc
Mode
FB
ISET
2.15V
IC Power
Undervoltage
Lockout
9
POUT
8
LX
7
PGND
2
REF
3
GND
6
CLK/SEL
4
FB
1
ISET
5
OUT
10
ON
10
ONN
1.25V
AS1326A
only
AS1326B
only
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