MAX1714BEEE Maxim Integrated Products, MAX1714BEEE Datasheet - Page 8

• Manufacturer Part Number: MAX1714BEEE
• Description: Current Mode PWM Controllers
• Manufacturer: Maxim Integrated Products

Specifications of MAX1714BEEE

• Number Of Outputs: 1
• Output Voltage: 1 V to 5.5 V
• Output Current: 3000 mA
• Mounting Style: SMD/SMT
• Package / Case: QSOP-16
• 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

High-Speed Step-Down Controller
for Notebook Computers
8
MAX1714A
_______________________________________________________________________________________
2, 9,
11
10
12
13
14
15
16
17
18
19
20
1
3
4
5
6
7
8
–
PIN
MAX1714B
PIN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
–
–
–
PGOOD
NAME
AGND
PGND
SHDN
GND
SKIP
N.C.
OUT
ILIM
TON
REF
V
V
BST
DH
FB
DL
V+
LX
DD
CC
High-Side Gate Driver Output. Swings from LX to BST.
No Connection. These pins are not connected to any internal circuitry. Connect N.C. pins
to the ground plane to enhance thermal conductivity.
Shutdown Control Input. Drive SHDN to AGND to force the MAX1714 into shutdown. Drive
or connect to V
Feedback Input. Connect to AGND for a +2.5V fixed output or to V
output, or connect FB to a resistor divider from OUT for an adjustable output.
Output Voltage Connection. Connect directly to the junction of the external and output fil-
ter capacitors. OUT senses the output voltage to determine the on-time and also serves
as the feedback input in fixed-output modes.
Current-Limit Threshold Adjustment. Connect ILIM to V
For an adjustable threshold, connect an external voltage source to ILIM, or use a two-resis-
tor divider from REF to AGND. The external adjustment range of 0.5V to 2.0V corresponds to
a current-limit threshold of 50mV to 200mV.
+2.0V Reference Voltage Output. Bypass to AGND with 0.22µF (minimum) capacitor. Can
supply 50µA for external loads.
Analog Ground.
Power-Good Open-Drain Output. PGOOD is low when the output voltage is more than 6%
below the normal regulation point or during soft-start. PGOOD is high impedance when
the output is in regulation and the soft-start circuit has terminated.
Analog and Power Ground. AGND and PGND connect together internally.
Power Ground. Connect directly to the low-side MOSFET’s source. Serves as the negative
input of the current-limit comparator.
Low-Side Gate-Driver Output. Swings from PGND to V
Supply Input for the DL Gate Drive. Connect to the system supply voltage, +4.5V to +5.5V.
Bypass to PGND with a 1µF (min) ceramic capacitor.
Analog-Supply Input. Connect to the system supply voltage, +4.5V to +5.5V, with a series
20Ω resistor. Bypass to AGND with a 1µF (min) ceramic capacitor.
On-Time Selection-Control Input. This is a four-level input used to determine DH on-time.
Connect to AGND, REF, or V
frequencies: AGND = 600kHz, REF = 450kHz, floating = 300kHz, and V
Battery Voltage Sense Connection. Connect to input power source. V+ is used only to set
the PWM one-shot timing.
Pulse-Skipping Control Input. Connect to V
to AGND to enable pulse-skipping operation.
Boost Flying-Capacitor Connection. Connect to an external capacitor and diode according
to the Standard Application Circuit (Figure 1). See MOSFET Gate Drivers (DH, DL) section.
External Inductor Connection. Connect LX to the switched side of the inductor. LX serves
as the lower supply rail for the DH high-side gate driver. LX is also the positive input to the
current-limit comparator.
CC
for normal operation. A rising edge on SHDN clears the fault latch.
CC
, or leave TON unconnected to set the following switching
FUNCTION
CC
for low-noise forced-PWM mode. Connect
CC
DD
for 100mV current-limit threshold.
.
Pin Description
CC
for a +3.3V fixed
CC
= 200kHz.