MAX1714BEEE+T Maxim Integrated Products, MAX1714BEEE+T Datasheet - Page 11

• Manufacturer Part Number: MAX1714BEEE+T
• Description: IC CNTRLR STP DWN HS 16-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1714BEEE+T

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 2.5V, 3.3V, Adj
• Current - Output: 8A
• Frequency - Switching: 200kHz, 300kHz, 600kHz
• Voltage - Input: 2 ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Power - Output: 667mW
• Output Voltage: 1 V to 5.5 V
• Output Current: 3000 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 600 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Synchronous Pin: No
• Topology: Buck
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 2. MAX1714 Functional Diagram
The heart of the PWM core is the one-shot that sets the
high-side switch on-time. This fast, low-jitter, adjustable
one-shot includes circuitry that varies the on-time in
response to battery and output voltage. The high-side
switch on-time is inversely proportional to the battery
voltage as measured by the V+ input, and proportional
to the output voltage. This algorithm results in a nearly
constant switching frequency despite the lack of a fixed-
2V TO 28V
IN
NOTE: IN THE MAX1714B, AGND AND PGND ARE INTERNALLY CONNECTED TO THE GND PIN.
TON
SKIP
SHDN
PGOOD
-6%
REF
TRIG
MAX1714A ONLY
COMPUTE
ON-TIME
1-SHOT
TON
TON
OVP/UVLO
______________________________________________________________________________________
V+
LATCH
Q
+12%
REF
FROM
On-Time One-Shot (TON)
REF
OUT
S1
Q
S2
ERROR
High-Speed Step-Down Controller
AMP
-30%
REF
TIMER
Q
1-SHOT
S
R
TOFF
Q
TRIG
FB
S
R
(SEE FIGURE 9)
FEEDBACK
CURRENT
Q
LIMIT
for Notebook Computers
MUX
x2
Σ
frequency clock generator. The benefits of a constant
switching frequency are twofold: first, the frequency can
be selected to avoid noise-sensitive regions such as the
455kHz IF band; second, the inductor ripple-current
operating point remains relatively constant, resulting in
easy design methodology and predictable output volt-
age ripple.
(MAX1714B ONLY)
9R
I
LIM
R
SUPPLY
On-Time = K (V
MAX1714
CHIP
ZERO CROSSING
REF
2V
(GND)
AGND
(GND)
PGND
OUT
BST
V
V
REF
DH
LX
DL
DD
CC
( ) ARE FOR THE MAX1714B ONLY.
+5V
+5V
OUT
+ 0.075V) / V
IN
+5V
OUTPUT
11