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ADP1613ARMZ-R7 数据表(PDF) 16 Page - Analog Devices

部件名 ADP1613ARMZ-R7
功能描述  650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters
PDF  28 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADP1613ARMZ-R7 数据表(HTML) 16 Page - Analog Devices

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ADP1612/ADP1613
Rev. A | Page 16 of 28
TYPICAL APPLICATION CIRCUITS
Both the ADP1612 and ADP1613 can be used in the application
circuits in this section.
The ADP1612 is geared toward applications requiring input
voltages as low as 1.8 V, where the ADP1613 is more suited for
applications needing the output power capabilities of a 2.0 A
switch. The primary differences are shown in Table 6.
Table 6. ADP1612/ADP1613 Differences
Parameter
ADP1612
ADP1613
Current Limit
1.4 A
2.0 A
Input Voltage Range
1.8 V to 5.5 V
2.5 V to 5.5 V
The Step-Up Regulator Circuit Examples section recommends
component values for several common input, output, and load
conditions. The equations in the Applications Information
section can be used to select components for alternate
configurations.
STEP-UP REGULATOR
The circuit in Figure 36 shows the ADP1612/ADP1613 in a
basic step-up configuration.
ADP1612/
ADP1613
6
3
7
8
5
2
1
4
VIN
EN
FREQ
SS
SW
FB
COMP
GND
ON
OFF
1.3MHz
650kHz
(DEFAULT)
VOUT
VIN
L1
CIN
CSS
COUT
CCOMP
RCOMP
R1
R2
D1
Figure 36. Step-Up Regulator
The modified step-up circuit in Figure 37 incorporates true
shutdown capability advantageous for battery-powered applica-
tions requiring low standby current. Driving the EN pin below
0.3 V shuts down the ADP1612/ADP1613 and completely
disconnects the input from the output.
ADP1612/
ADP1613
6
3
7
8
5
2
1
4
VIN
EN
FREQ
SS
SW
FB
COMP
GND
1.3MHz
650kHz
(DEFAULT)
VOUT
L1
CIN
CSS
COUT
CCOMP
RCOMP
R1
R2
D1
VIN
R3
10k
Ω
NTGD1100L
Q1
A
B
Q1
ON
OFF
Figure 37. Step-Up Regulator with True Shutdown
STEP-UP REGULATOR CIRCUIT EXAMPLES
ADP1612 Step-Up Regulator
ADP1612
6
3
7
8
5
2
1
4
VIN
EN
FREQ
SS
SW
FB
COMP
GND
ON
OFF
VOUT = 5V
VIN = 1.8V TO 4.2V
L1
4.7µH
CSS
33nF
COUT
10µF
CCOMP
3300pF
RCOMP
6.8k
Ω
R1
30k
Ω
R2
10k
Ω
D1
3A, 40V
CIN
10µF
L1: DO3316P-472ML
D1: MBRA340T3G
R1: RC0805FR-0730KL
R2: CRCW080510K0FKEA
RCOMP: RC0805JR-076K8L
CCOMP: ECJ-2VB1H332K
CIN: GRM21BR61C106KE15L
COUT: GRM32DR71E106KA12L
CSS: ECJ-2VB1H333K
Figure 38. ADP1612 Step-Up Regulator Configuration
VOUT = 5 V, fSW = 650 kHz
100
90
80
70
60
50
40
30
1
10
100
1k
10k
LOAD CURRENT (mA)
VOUT = 5V
fSW = 650kHz
TA = 25°C
VIN = 1.8V
VIN = 2.7V
VIN = 3.3V
VIN = 4.2V
ADP1612
Figure 39. ADP1612 Efficiency vs. Load Current
VOUT = 5 V, fSW = 650 kHz
VOUT = 5V
fSW = 650kHz
T
TIME (100µs/DIV)
OUTPUT VOLTAGE (50mV/DIV)
AC-COUPLED
LOAD CURRENT (50mA/DIV)
Figure 40. ADP1612 50 mA to 150 mA Load Transient (VIN = 3.3 V)
VOUT = 5 V, fSW = 650 kHz



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