MAX8720ETX+ Maxim Integrated Products, MAX8720ETX+ Datasheet - Page 14

• Manufacturer Part Number: MAX8720ETX+
• Description: IC CNTRL VID STP DWN 36-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8720ETX+

• Applications: Controller, CPU GPU
• Voltage - Input: 2 ~ 28 V
• Number Of Outputs: 1
• Voltage - Output: 0.28 ~ 1.85 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-TQFN Exposed Pad
• Output Voltage: 0.275 V to 1.85 V
• Input Voltage: 2 V to 28 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

On-times translate only roughly to switching frequen-
cies. The on-times guaranteed in the Electrical
Characteristics table are influenced by switching delays
in the external high-side MOSFET. Resistive losses,
including the inductor, both MOSFETs, output-capacitor
Dynamically Adjustable 6-Bit VID
Step-Down Controller
Figure 2. MAX8720 Block Diagram
14
______________________________________________________________________________________
2V TO 28V
V
BATT
PGOOD
TON
SHDN
CC
GNDS
FBS
-15%
REF
TRIG
G
m
COMPUTE
ONE-SHOT
ON-TIME
TON
TON
V+
G
m
Q
FB
+15%
FROM
REF
REF
D/A
70kΩ
G
m
ERROR
10kΩ
AMP
SKIP
OVP/UVP
DETECT
REF
Q
ONE-SHOT
SUS
S
R
TOFF
MUX AND SLEW CONTROL
Q
TRIG
D/A CONVERTER
S
R
S0, S1
R-2R
CURRENT
Q
LIMIT
ESR, and PC board copper losses in the output and
ground tend to raise the switching frequency at higher
output currents. Also, the dead-time effect increases the
effective on-time, reducing the switching frequency. It
occurs only in PWM mode (SKIP = high) and during
Σ
D0–D5
9
ILIM
CHIP SUPPLY
1
ZERO CROSSING
MAX8720
TIME
REF
2V
AGND
PGND
REF
BST
V
V
REF
DH
LX
DL
FB
DD
CC
+5V
+5V
+5V
V
OUT