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PDF AAT1210 Data sheet ( Hoja de datos )
| Número de pieza | AAT1210 | |
| Descripción | High Power DC/DC Boost Converter | |
| Fabricantes | AAT | |
| Logotipo |  |
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AAT1210
High Power DC/DC Boost Converter
with Optional Dynamic Voltage Programming
General Description
Features
SwitchReg™
The AAT1210 is a high power DC/DC boost (step-up)
converter with an input voltage range from 2.7 to
• VIN Range: 2.7V to 5.5V
• Maximum Continuous Output
5.5V. The output voltage can be set from VIN + 0.5V
to 18V. The total solution is less than 1mm in height.
— 900mA at 5V
— 300mA at 12V
High operating efficiency makes the AAT1210 the
— 150mA at 18V
ideal solution for battery powered and consumer
• Up to 2MHz Switching Frequency
applications.
• Ultra-Small Inductor and Capacitors
The step-up converter operates at frequencies up to
2MHz, enabling ultra-small external filtering compo-
nents. Hysteretic current mode control provides
excellent transient response with no external com-
pensation, achieving stability across a wide operating
range with minimal design effort.
— 1mm Height Inductor
— Small Ceramic Capacitors
• Hysteretic Current Mode Control
— No External Compensation
— Excellent Transient Response
— High Efficiency at Light Load
• Up to 90% Efficiency
The AAT1210 true load disconnect feature extends
battery life by isolating the load from the power
• Integrated Low RDS(ON) MOSFET Switches
• Low Inrush with Integrated Soft Start
source when the EN/SET pin is pulled low, ensuring
• Cycle-by-Cycle Current Limit
zero volts output during the disable state. This fea-
• Short-Circuit and Over-Temperature Protection
ture eliminates the external boost converter leakage
• True Load Disconnect
path and achieves standby quiescient current <1µA
• Optional Dynamic Voltage Programming
without an external switching device.
• TDFN34-16 Package
A fixed output voltage is set using two external resis- •www.DataSheet4U.com -40°C to +85°C Temperature Range
tors. Alternatively, the output may be adjusted dynami-
cally across a 2.0x range. The output can toggle
Applications
between two preset voltages using the SEL logic pin.
Optionally, the output can be dynamically set to any
• GPS Systems
one of 16 programmed levels using AnalogicTech's
• DVD Blu-Ray
patented Simple Serial Control™ (S2Cwire™) interface.
• Handheld PCs
The AAT1210 is available in a Pb-free, thermally-
enhanced 16-pin 3x4mm TDFN low-profile package
and is rated over the -40°C to +85°C temperature
• PDA Phones
• Portable Media Players
• USB OTG
range.
Typical Application
VIN
3.6V
C1
4.7µF
0603
AAT1210
TDFN34-16
VIN LIN
L1
0.47µH
VOUT
5V @ 900mA
D1
EN/SET
SW
SEL
GND
FB1
FB2
R3
4.99kΩ
R2
40.2kΩ
C2
10µF
0603
AAT1210 Boost Converter Output Capability
(TDFN34-16; TAMB = 25°C; TC(RISE) = +50°C)
1400
1200 VIN = 4.5V
7
1000
800 VIN = 3.6V
600 VIN = 2.7V
400
200
0
5 6 7 8 9 10 11 12 13 14 15 16 17 18
Output Voltage (V)
1210.2007.02.1.2
1
1 page  
AAT1210
High Power DC/DC Boost Converter
with Optional Dynamic Voltage Programming
Electrical Characteristics1
VIN = 3.6V, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol
SEL, EN/SET
VSEL(L)
VSEL(H)
VEN/SET(L)
VEN/SET(H)
TEN/SET LO
TEN/SET HI MIN
TEN/SET HI MAX
TOFF
TLAT
IEN/SET
Description
SEL Threshold Low
SEL Threshold High
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
Minimum EN/SET High Time
Maximum EN/SET High Time
EN/SET Off Timeout
EN/SET Latch Timeout
EN/SET Input Leakage
Conditions
VIN = 2.7V
VIN = 5.5V
VIN = 2.7V
VIN = 5.5V
Min Typ Max Units
0.4 V
1.4 V
0.4 V
1.4 V
0.3 75 µs
50 ns
75 µs
500 µs
500 µs
-1 1 µA
1. Specifications over the -40°C to +85°C operating temperature range are assured by design, characterization and correlation with sta-
tistical process controls.
1210.2007.02.1.2
5
5 Page 
AAT1210
High Power DC/DC Boost Converter
with Optional Dynamic Voltage Programming
Functional Block Diagram
VIN
VP LIN
EN/SET
FB1
FB2
SEL
Soft-Start
Timer
VREF1
VREF2
Output
Select
Control
GND
SW
PGND
Functional Description
The AAT1210 consists of a DC/DC boost (step-up)
controller, an integrated slew rate controlled input
disconnect MOSFET switch, and a MOSFET power
switch. A high voltage rectifier, power inductor,
capacitors and resistor divider network are required
to implement a DC/DC boost converter. The mini-
mum output voltage must be 0.5V above the input
voltage and the maximum output voltage is 18V.
The operating input voltage range is 2.7V to 5.5V.
Control Loop
The AAT1210 provides the benefits of current
mode control with a simple hysteretic feedback
loop. The device maintains exceptional DC regula-
tion, transient response, and cycle-by-cycle current
limit without additional compensation components.
The AAT1210 modulates the power MOSFET
switching current in response to changes in output
1210.2007.02.1.2
voltage. This allows the voltage loop to directly pro-
gram the required inductor current in response to
changes in the output load.
The switching cycle initiates when the N-channel
MOSFET is turned ON and current ramps up in the
inductor. The ON interval is terminated when the
inductor current reaches the programmed peak
current level. During the OFF interval, the input cur-
rent decays until the lower threshold, or zero induc-
tor current, is reached. The lower current is equal
to the peak current minus a preset hysteresis
threshold, which determines the inductor ripple cur-
rent. The peak current is adjusted by the controller
until the output current requirement is met.
The magnitude of the feedback error signal deter-
mines the average input current. The AAT1210
controller implements a programmed current
source connected to the output capacitor and load
resistor. There is no right-half plane zero, and loop
stability is achieved with no additional compensa-
tion components.
11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet AAT1210.PDF ] | |
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