MAX5089ATE+ Maxim Integrated Products, MAX5089ATE+ Datasheet - Page 8

• Manufacturer Part Number: MAX5089ATE+
• Description: IC DC-DC CONV BUCK 16TQFN
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX5089ATE+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 20 V
• Current - Output: 2A
• Frequency - Switching: 200kHz ~ 2.2MHz
• Voltage - Input: 4.5 ~ 23 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Power - Output: 2.67W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.2MHz, 2A Buck Converters with an
Integrated High-Side Switch
8
PIN
1, 2
10
11
12
13
14
15
16
—
3
4
5
6
7
8
9
_______________________________________________________________________________________
SOURCE
BST/VDD
BYPASS
PGOOD
NAME
DRAIN
COMP
RESET
SGND
PGND
SYNC
OSC
CKO
EN
FB
V+
DL
EP
V
L
Internal Power MOSFET Drain Connection. Use the MOSFET as a high-side switch and connect DRAIN to the
input supply.
Transconductance Error Amplifier Output. Connect a compensation network from COMP to SGND or from
COMP to FB to SGND (see the Compensation section).
Feedback Input. Connect a resistive divider from the output to FB to SGND to set the output voltage.
Switching Frequency Set Input. Connect a resistor R
When using external synchronization, program R
required when external synchronization is used.
Reference Bypass Connection. Bypass to SGND with a 0.22µF or greater ceramic capacitor.
Input Supply Voltage. V+ can range from 5.5V to 23V. Connect V+ and V
operation. Bypass V+ to SGND with a minimum of 0.1µF ceramic capacitor.
Internal Regulator Output. Bypass V
ceramic capacitor. Connect V+ to V
Clock Output (MAX5088 Only). CKO is an output with the same frequency as the converter’s switching
frequency and 115° out-of-phase. CKO is used to synchronize the MAX5088 to other MAX5088/MAX5089s.
Low-Side Synchronous Rectifier Driver (MAX5089 Only). DL sources 0.7A and sinks 1A to quickly turn on and
off the external synchronous rectifier MOSFET.
Signal Ground
Power Ground. Connect the rectifier diode’s anode, the input capacitor negative terminal, the output capacitor
negative terminal, and V
Internal Power MOSFET Source Connection. Connect SOURCE to the switched side of the inductor as shown in
Figure 5.
External Synchronization Input. Connect SYNC to an external logic-level clock to synchronize the MAX5088/
MAX5089. Connect SYNC to SGND when not used.
Open-Drain Active-Low Reset Output (MAX5088 Only). RESET remains low while the converter’s output is
below 92.5% of V
high after the reset timeout period of 200ms (typ).
Open-Drain Power-Good Output (MAX5089 Only). PGOOD remains low while the output is below 92.5% of its
nominal set point.
Internal MOSFET Driver Supply Input. Connect BST/VDD to an external ceramic capacitor and diode (see
Figure 5).
Enable Input. A logic-low turns off the converter. A logic-high turns on the device. Connect EN to V
always-on application.
Exposed Pad. Connect to SGND. Solder EP to SGND to enhance thermal dissipation.
OUT
’s nominal set point. When V
L
bypass capacitor negative terminal to PGND.
L
L
for 4.5V to 5.5V operation.
to SGND with a 4.7µF ceramic capacitor and to PGND with a 0.1µF
OSC
OUT
FUNCTION
OSC
so that (0.2 x f
rises above 92.5% of its nominal set point, RESET goes
from OSC to SGND to set the switching frequency.
SYNC
L
) ≤ f
together for 4.5V to 5.5V input
SW
≤ (1.2 x f
Pin Description
SYNC
). R
OSC
L
for an
is still