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PDF AAT1105A Data sheet ( Hoja de datos )
| Número de pieza | AAT1105A | |
| Descripción | BUCK BOOST AND BOOST PWM CONTROLLER | |
| Fabricantes | Advanced Analog Technology | |
| Logotipo |  |
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Advanced Analog Technology, Inc.
AAT1105A
Details are subject to change without notice.
BUCK_BOOST & BOOST PWM CONTROLLER
Features
www.DataShzeet4UC.coomm plete PWM Power Control Circuitry
CH1: Buck_Boost, CH2: Boost
z Under-Voltage Lockout (UVLO) Protection
z Totem Pole Output
z Output Short Circuit Protection
z Dead-Time Control 0% to 100%
z Wide Operating Frequency
10kHz to 800kHz
z Shutdown Control
z Power Good Protection
z VDD Range: 2.6V~6.5V
Pin Configuration
TOP VIEW
Ct
Rt
SHDN
IE1
OE1
1
2
3
4
5
16 VREF
15 SCP
14 PGO
13 IE2
12 OE2
DTC1 6
11 DTC2
OUT1
GND
7
8
10 OUT2
9 VDD
(TSSOP-16 PACKAGE)
General Description
The AAT1105A provides an integrated two-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system. This device
offers system engineers the flexibility to tailor-make
the power supply circuitry for specific applications.
Each channel contains its own error amplifier,
PWM comparator, dead–time control (DTC), and
output driver. The under-voltage protection,
oscillator, short circuit protection (SCP) and voltage
reference circuit are the common features for the
two channels.
The AAT1105A contains one step-up (boost) circuit
at channel two (CH2) and one inverting
(buck_boost) circuit at channel one (CH1).
Dead-time control can be set to provide 0% to
100% dead-time through a resistive divider network.
Soft-start can be implemented by paralleling the
DTC resistor with a capacitor. Two dead-time
control inputs are assigned for CH1 and CH2
individually, and dead-time control inputs can be
used to control on / off operation.
The compact design and optimized external parts of
AAT1105A offers a simple and effective solution.
––
– Advanced Analog Technology, Inc. –
Page 1 of 16
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Advanced Analog Technology, Inc.
AAT1105A
Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (See Note 1) (Cont.)
Reference Voltage
Parameter
Test Conditions
Min Typ Max Unit
Internal Reference Voltage
Reference Voltage
www.DataSheet4U.com
Input Voltage Regulation
Output Regulation
VREFi
VREF
VRI
VRO
IREF = −1mA , TC = 25 oC 0.622
IREF = −1mA , TC = 25 oC 1.280
IREF = −1mA ,
VDD = 2.6V to 6.0V
IREF = −0.1mA to − 1mA
-
-
0.641
1.293
1
1
0.660
1.306
10
6
V
mV
mV
EA (Error Amplifier)
Parameter
Input Offset Voltage
Input Bias Current
Input Voltage Range
Open-Loop Voltage
Amplification
Output Voltage Swing
Output Sink Current
Output Source Current
Common-Mode Rejection
Ratio
VIO
I IB
VIR
A VO
VOS+
VOS−
I OS+
I OS−
Test Condition
CH1,CH2, Unity Gain
CH1, CH2
CH1, CH2
OE=0.65V
OE=0.65V
CMRR
Min Typ Max Unit
- - 6 mV
- ±15 ±100 nA
0.5 - 1.5 V
70 85 - dB
1.7 2.0 -
V
- 0.2 0.4
3 10 - mA
- − 65 − 45 µA
60 80 - dB
PRDB (Power Good Protection)
Parameter
Test Condition
Low Level Output Voltage
Pull-High
Vdbl R 20 = 100kΩ
Min Typ Max Unit
- 0.2 0.4 V
––
– Advanced Analog Technology, Inc. –
Page 5 of 16
V 1.0
5 Page 
Advanced Analog Technology, Inc.
Boost Step-up Timing Chart CH-2
AAT1105A
www.DataSheet4U.com
DTC
OE
PWM
OUTPUT
1.29V
1.0V
0.56V
OUTPUT
SCP
0.85
V
SCP COMP
2.03V
VDD
LOCKOUT
FREE
PGO
Note:
t SCP
≅
CSCP Vr2
ISCP
tSCP
––
– Advanced Analog Technology, Inc. –
Page 11 of 16
V 1.0
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AAT1105A.PDF ] | |
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