DR73-100-R

Part No.:
DR73-100-R
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Description:
1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
File Size:
692 K
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28 Pages
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PCB Prototype

July 16, 2018:

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PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1
1.2 A, 20 V, 700 kHz/1.4 MHz,
Nonsynchronous Step-Down Regulator
ADP2300/ADP2301
FEATURES
1.2 A maximum load current
±2% output accuracy over temperature range
Wide input voltage range: 3.0 V to 20 V
700 kHz (ADP2300) or 1.4 MHz (ADP2301)
switching frequency options
High efficiency up to 91%
Current-mode control architecture
Output voltage from 0.8 V to 0.85 × V
IN
Automatic PFM/PWM mode switching
Precision enable pin with hysteresis
Integrated high-side MOSFET
Integrated bootstrap diode
Internal compensation and soft start
Minimum external components
Undervoltage lockout (UVLO)
Overcurrent protection (OCP) and thermal shutdown (TSD)
ADIsimPower™ online design tool
Available in ultrasmall, 6-lead TSOT package
TYPICAL APPLICATIONS CIRCUIT
3.0V TO 20V
BST
VIN
V
OUT
ADP2300/
ADP2301
ON
OFF
EN
GND
SW
FB
08342-001
Figure 1.
100
95
90
EFFICIENCY (%)
85
80
75
70
65
60
f
SW
= 1.4MHz
f
SW
= 700kHz
APPLICATIONS
LDO replacement for digital load applications
Intermediate power rail conversion
Communications and networking
Industrial and instrumentation
Healthcare and medical
Consumer
V
IN
= 12V
V
OUT
= 5.0V
0
0.2
0.4
0.6
I
OUT
(A)
0.8
1.0
1.2
08342-069
Figure 2. Efficiency vs. Output Current
GENERAL DESCRIPTION
The ADP2300/ADP2301 are compact, constant-frequency,
current-mode, step-down dc-to-dc regulators with integrated
power MOSFET. The ADP2300/ADP2301 devices run from
input voltages of 3.0 V to 20 V, making them suitable for a wide
range of applications. A precise, low voltage internal reference
makes these devices ideal for generating a regulated output
voltage as low as 0.8 V, with ±2% accuracy, for up to 1.2 A load
current.
There are two frequency options: the ADP2300 runs at 700 kHz,
and the ADP2301 runs at 1.4 MHz. These options allow users to
make decisions based on the trade-off between efficiency and
total solution size. Current-mode control provides fast and stable
line and load transient performance. The ADP2300/ADP2301
devices include internal soft start to prevent inrush current at
power-up. Other key safety features include short-circuit protec-
tion, thermal shutdown (TSD), and input undervoltage lockout
(UVLO). The precision enable pin threshold voltage allows the
ADP2300/ADP2301 to be easily sequenced from other input/
output supplies. It can also be used as a programmable UVLO
input by using a resistive divider.
The ADP2300/ADP2301 are available in a 6-lead TSOT package
and are rated for the −40°C to +125°C junction temperature range.
Rev. 0
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