ADP1829ACPZ-R7 Analog Devices Inc, ADP1829ACPZ-R7 Datasheet - Page 27

• Manufacturer Part Number: ADP1829ACPZ-R7
• Description: IC BUCK SYNC ADJ 100uA 32LFCSP
• Manufacturer: Analog Devices Inc
• Type: Step-Down (Buck)r

Specifications of ADP1829ACPZ-R7

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 15 V
• Current - Output: 100µA
• Frequency - Switching: 300kHz, 600kHz
• Voltage - Input: 3 ~ 18 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-LFCSP
• Power - Output: 1W
• Primary Input Voltage: 20V
• No. Of Outputs: 2
• Output Voltage: 17V
• No. Of Pins: 32
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 3 - 168 Hours
• Frequency Max: 1MHz
• Termination Type: SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ADP1829-EVALZ - BOARD EVALUATION ADP1829
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: ADP1829ACPZ-R7TR

APPLICATION CIRCUITS
The ADP1829 controller can be configured to regulate outputs
with loads of more than 20 A if the power components, such as
the inductor, MOSFETs and the bulk capacitors, are chosen
carefully to meet the power requirement. The maximum load
and power dissipation are limited by the powertrain components.
Figure 1 shows a typical application circuit that can drive an
output load of 8 A.
Figure 34 shows an application circuit that can drive 20 A loads.
Note that two low-side MOSFETs are needed to deliver the 20 A
load. The bulk input and output capacitors used in this example
are Sanyo OSCON™ capacitors, which have low ESR and high
current ripple rating. An alternative to the OSCON capacitors
1.2V, 20A
C
820µF
OUT2
25V
×2
1µF
5600pF
390Ω
2kΩ
180µF
2kΩ
C
1µH
V
20V
L2
IN2
IN
M6
= 5.5V TO 18V
1µF
f
M1, M4: IRLR7807Z
L1, L2: TOKO, FDA1254-1ROM
C
OSC
OUT1
Figure 34. Application Circuit with 20 A Output Loads
M5
M4
= 300kHz
10kΩ
: SANYO, 2R5SEPC820M
120nF
1µF
0.47µF
4.7nF
2kΩ
D2
Rev. B | Page 27 of 32
TRK1
TRK2
VREG
BST1
DH1
SW1
CSL1
DL1
PGND1
FB1
COMP1
GND
PV
ADP1829
AGND
IN
COMP2
PGND2
LDOSD
FREQ
SYNC
BST2
CSL2
SW2
DH2
EN1
EN2
DL2
FB2
D1, D2: VISHAY, BAT54
M2, M3, M5, M6: IRFR3709Z
C
C
IN1
OUT2
are the polymer aluminum capacitors that are available from
other manufacturers such as United Chemi-con. Aluminum
electrolytic capacitors, such as Rubycon’s ZLG low ESR series,
can also be paralleled up at the input or output to meet the
ripple current requirement. Because the aluminum electrolytic
capacitors have higher ESR and much larger variation in
capacitance over the operating temperature range, a larger bulk
input and output capacitance is needed to reduce the effective
ESR and suppress the current ripple. Figure 34 shows that the
polymer aluminum or the aluminum electrolytic capacitors can
be used at the outputs.
, C
: RUBYCON, 6.3ZLG1200M10×16
IN2
: SANYO, 20SP180M
0.47µF
6.8nF
D1
2kΩ
1.5nF
47kΩ
M1
M2
1µF
PGND
M3
C
180µF
20V
IN1
1µH
L1
2kΩ
1kΩ
200Ω
10nF
1µF
C
1200µF
6.3V
×3
OUT1
1.8V, 20A
ADP1829