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AAT2689 데이터시트 PDF




Advanced Analogic Technologies에서 제조한 전자 부품 AAT2689은 전자 산업 및 응용 분야에서
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AAT2689 데이터시트, 핀배열, 회로
PRODUCT DATASHEET
AAT2689
SystemPowerTM PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters
General Description
The AAT2689 provides two independently regulated DC
outputs, consisting of a high voltage step-down (Buck)
regulator and a low input voltage low dropout (LDO) regu-
lator. The PMIC is optimized for low cost 12V adapter
inputs, making the device the ideal system-on-a-chip
power solution for consumer communications equipment.
Channel 1 is a step-down (Buck) regulator with an input
voltage range of 6V to 24V providing up to 2500mA out-
put current. 490kHz fixed switching frequency allows
small L/C filtering components. Channel 1 utilizes volt-
age mode control configured for optimum performance
across the entire output voltage and load range.
Channel 2 is a low-dropout (LDO) regulator providing up
to 600mA output current. The device provides extremely
low output noise, low quiescent current and excellent
transient response.
The controller includes integrated cycle-by-cycle over-
current protection, soft-start and over-temperature dis-
able features. Independent input and enable pins pro-
vide maximum design flexibility.
The AAT2689 is available in the Pb-free 3x4mm 16-pin
TDFN package. The rated operating temperature range is
-40°C to 85°C.
Features
• 2-Output Step-Down Converters:
Channel 1 (Buck): VIN1 = 6V to 24V
VOUT1 adjustable from 1.5V to 5.5V
IOUT1 up to 2.5A
• High Switching Frequency
• Voltage Mode Control
• PWM Fixed Frequency for Low-Ripple
Channel 2 (LDO): VIN2 = 2.7V to 5.5V
IOUT2 up to 600mA
• 1V Dropout Voltage at 600mA
• High Accuracy ±1.5%
• Small Solution Size
System on a Chip
Ultra-small External L/C
• Shutdown Current <35μA
• Independent Enable Pins
• Adjustable Over-Current Protection
• Over-Temperature Protection
• Internal Soft Start
• 3x4mm 16-Pin TDFN Low Profile Thermally Enhanced
Package
• -40°C to 85°C Temperature Range
Applications
• DSL and Cable Modems
• Notebook Computers
• Satellite Settop Box
• Wireless LAN Systems
Typical Application
VIN1
6.0V -24.0V
1
C4
0.1µF
D1
C6
2.2µF
C1 +
220µF
25V
EN1
C15
1µF
25V
VIN2
C5
2.2µF
TDFN34-16
BST1 LX1
VL1
IN1 RS1
OS1
AAT2689
EN1 FB1
IN2 COMP1
EN2 OUT2
GND
L1 4.7µH/5.3A
VOUT1
3.3V/2.5A
D2 R2 C7
2k 220nF
C8
330pF
R5
499
R3
27.4k
C9,C11
2x22µF
R1 24.3K
C2 470pF
C3 56pF
C10
2.2µF
VOUT2
1.8V/600mA
R4
6.04k
2689.2008.06.1.0
www.DataSheet.in
www.analogictech.com
1




AAT2689 pdf, 반도체, 판매, 대치품
PRODUCT DATASHEET
AAT2689
SystemPowerTM PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters
Electrical Characteristics1
VIN1 = 12.0V, VIN2 =3.3V; TA = -40°C to 85°C, unless noted otherwise. Typical values are at TA = 25°C.
Symbol Description
Conditions
Channel 1: Step-Down (Buck) Converter
VIN1 Input Voltage
VIN1 Rising
VUVLO1
UVLO Threshold
VIN1 Hysteresis
VIN1 Falling
VOUT1
Output Voltage Range
VFB1 Feedback Pin Voltage
VOUT1
Output Voltage Accuracy
IOUT1 = 0 to 2.5A
(ΔVOUT1/VOUT1) /
ΔVIN1
Line Regulation
VIN1 = 6V to 24V, VOUT1 = 3.3V,
IOUT1 = 0V to 2.5A
(ΔVOUT1/VOUT1) /
ΔIOUT1
Load Regulation
VIN1 = 6V to 24V, VOUT1 = 3.3V,
IOUT1 = 0A to 2.5A
IQ1 Quiescent Current
VEN1 = High, No load
ISHDN1
Shutdown Current
VEN1 = Low, VL1 = 0V
VOCP1
Over-Current Offset Voltage
VEN1 = High, VIN1 = 6V to 24V, TA = 25°C
ILX1 LX Pin Leakage Current
VIN1 = 24.0V, VEN1 = Low
DMAX
Maximum Duty Cycle
TON(MIN)
Minimum On-Time
VIN1 = 6V to 24V
RDSON(H)
Hi Side On-Resistance
VL1 = 4.5V
FOSC1
Oscillator Frequency
FFOLDBACK1
Short Circuit Foldback Frequency Current Limit Triggered
TS1 Start-Up Time
From Enable Channel 1 to Output Regulation
Channel 2: 600mA Linear Low Dropout (LDO) Regulator
VIN2
VDO2
IQ2
ISHDN2
VOUT2(TOL)
eN
Input Voltage
Dropout Voltage
Quiescent (Ground) Current
Shutdown Current
Output Voltage Tolerance
Output Noise
98% x VOUT2(NOM), IOUT2 = 600mA
No load
VEN2 = GND
IOUT2 = 1 to 600mA, VIN2 = 2.7V to 5.5V,
TA = 25°C
IOUT2 = 1 to 600mA, VIN2 = 2.7V to 5.5V,
TA = -40°C to 85°C
BW = 300Hz to 50kHz
1kHz
PSRR
Power Supply Rejection Ratio
IOUT2 = 10mA
10kHz
1MHz
ILIMIT2
Current Limit
TS2 Enable Start-Up Delay
Over-Temperature, EN Logic
From Enable Channel 2 to Output Regulation
TSD1,2
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
VEN1,EN2(L)
VEN1(H)
VEN2(H)
IEN1,EN2
Enable Threshold Low
Enable Threshold High
Enable Threshold High
Input Low Current
Min Typ Max Units
6.0
3.0
1.5
0.591
-3.0
300
0.600
24.0
5.0
5.5
0.609
+3.0
0.014
V
V
mV
V
V
V
%
%/V
0.1 %/A
80
-1.0
350
0.6
35.0
100 120
1.0
85
100
70
490 650
100
2.5
mA
μA
mV
μA
%
ns
mΩ
kHz
kHz
ms
2.7
-2.0
1000
70
5.5
1300
125
1.0
+2.0
V
mV
μA
μA
%
-3.5
700
250
67
47
45
800
15
+3.5
%
μVRMS
dB
mA
μs
135
15
2.5
1.4
-1.0
0.6
1.0
°C
°C
V
V
V
μA
1. The AAT2689 is guaranteed to meet performance specifications over the –40°C to +85°C operating temperature range and is assured by design, characterization and correla-
tion with statistical process controls.
4
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AAT2689 전자부품, 판매, 대치품
PRODUCT DATASHEET
AAT2689
SystemPowerTM PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters
Typical Characteristics
Step-Down Converter Input Current
vs. Input Voltage
(VEN1 = VIN1)
0.70
0.65
0.60
0.55
0.50
85°C
0.45 25°C
-40°C
0.40
6 9 12 15 18 21 24
Input Voltage (V)
LDO Dropout Voltage vs. Temperature
1400
1200
1000
800
600
400
200
0
-40 -20
0
IOUT2 = 600mA
IOUT2 = 500mA
IOUT2 = 300mA
IOUT2 = 150mA
IOUT2 = 50mA
20 40 60 80 100
Temperature (°C)
1.84
1.82
1.80
1.78
1.76
1.74
1.72
1.70
1.5
LDO Dropout Characteristics
(VOUT2 = 1.8V)
IOUT2 = 0.1mA
IOUT2 = 10mA
IOUT2 = 50mA
IOUT2 = 100mA
IOUT2 = 300mA
IOUT2 = 600mA
2 2.5 3 3.5 4 4.5
Input Voltage (V)
LDO Dropout Voltage vs. Output Current
1500
1200
900
600
300
0
0
85°C
25°C
-40°C
100
200 300 400
Output Current (mA)
500
600
LDO Input Current vs. Input Voltage
(VEN1 = 0V; VEN2 = VIN2)
100
80
60
40
85°C
20 25°C
-40°C
0
2 2.5
3 3.5 4
4.5 5
Input Voltage (V)
LDO VIH and VIL vs. Input Voltage
1.30
1.25
1.20
1.15
1.10
1.05
1.00
2.5
3
3.5 4
4.5
Input Voltage (V)
VIH
VIL
5 5.5
2689.2008.06.1.0
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