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MAX1684EEE Datasheet(PDF) 7 Page - Maxim Integrated Products

Part # MAX1684EEE
Description  Low-Noise, 14V Input, 1A, PWM Step-Down Converters
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1684EEE Datasheet(HTML) 7 Page - Maxim Integrated Products

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Low-Noise, 14V Input, 1A, PWM
Step-Down Converters
_______________________________________________________________________________________
7
Pin Description
Typical Operating Characteristics (continued)
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
VIN
5V/div
0V
VOUT
100mV/div
2ms/div
LINE-TRANSIENT RESPONSE
MAX1684/85-19
MAX1684, ILOAD = 100mA, VIN = 5V TO 10V,
SYNC/PWM = 3.3V
VSHDN
5V/div
IIN
50mA/div
10ms/div
START-UP CURRENT
MAX1684/85-20
MAX1684, ILOAD = 100mA, VOUT = 3.3V,
VIN = 5V, CILIM/SS = 0.1µF, SYNC/PWM = 3.3V
PIN
High-Side MOSFET Gate Bias. Bias voltage for P-channel switch. Bypass to IN with a 0.1µF capacitor.
CVH
1
FUNCTION
NAME
Analog Supply Voltage Input. Connect to IN with a 0.2 in. metal trace. Bypass to PGND with a 0.1µF
capacitor.
AIN
2
Logic Supply Voltage Output and IC Logic Supply. Sources 5mA for external loads. Bypass to AGND
with 1µF capacitor.
CVL
4
Supply Voltage Input
IN
3
Reference Output. 1.25V reference output supplies 10µA for external loads. Bypass to AGND with 0.1µF
capacitor.
REF
6
Integrator Capacitor Connection. Connect a 0.01µF capacitor to AGND.
CC
8
Dual Mode Feedback Input. Connect FB to VOUT for 1.25V output. Connect to an external resistor divider
to adjust the output voltage. Connect to AGND to set output voltage to 3.3V.
FB
7
Analog Ground
AGND
5
Current-Limit Adjust/Soft-Start Input. See
Current Limit and Soft-Start section.
ILIM/SS
10
Bootstrap Input. Connection for the bootstrap switch and internal feedback path. Connect BOOT to VOUT
for VOUT < 5.5V. Connect BOOT to AGND for VOUT > 5.5V.
BOOT
12
Standby Control Input. Connect to CVL for normal operation. Connect to AGND for low-power mode
(Table 1). This pin overrides SYNC/PWM setting.
STBY
11
Active-Low Shutdown Input. Connect to ground for shutdown. SHDN can withstand the input voltage.
SHDN
15
Power Ground
PGND
16
Inductor Connection. Drain for internal P-channel MOSFETs. Connect inductor from LX to OUT.
LX
13, 14
SYNC/PWM Input:
For synchronized-PWM operation, drive with TTL level, 50% square wave.
Connect to CVL for PWM mode.
Connect to AGND for normal mode.
SYNC/PWM
9


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