Pin description – Rainbow Electronics MAX5069 User Manual
Page 8
MAX5069
High-Frequency, Current-Mode PWM Controller
with Accurate Oscillator and Dual FET Drivers
8
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Pin Description
PIN
MAX5069A
MAX5069D
MAX5069B
MAX5069C
NAME
FUNCTION
1
1
RT
Oscillator-Timing Resistor. Connect a resistor from RT to AGND to set the internal oscillator
frequency.
2
—
SYNC
External-Clock Sync Input. Connect SYNC to AGND when not using an external clock.
—
2
HYST
Hysteresis Input
3
3
SCOMP
Slope-Compensation Capacitor Connection
4
4
DT
Dead-Time Resistor Connection. Connect a resistor from DT to AGND to program the
output dead time. Connect to REG5 for NDRVA and NDRVB maximum 50% duty cycle.
5
5
UVLO/EN
Externally Programmable Undervoltage Lockout. UVLO/EN programs the input start
voltage. Connect UVLO/EN to AGND to disable the output.
6
6
FB
Error-Amplifier Inverting Input
7
7
COMP
Error-Amplifier Output
8
8
FLTINT
Fault-Integration Input. A capacitor connected to FLTINT charges with an internal 60µA
current source during persistent current-limit faults. Switching terminates when V
FLTINT
is
2.8V. An external resistor connected in parallel discharges the capacitor. Switching
resumes when V
FLTINT
drops to 1.6V.
9
9
CS
Current-Sense Resistor Connection
10
10
AGND
Analog Ground. Connect to PGND.
11
11
PGND
Power Ground. Connect to AGND through a ground plane.
12
12
NDRVB
G ate- D r i ver O utp ut B. C onnect N D RV B to the g ate of the exter nal N - channel FE T.
13
13
NDRVA
Gate-Driver Output A. Connect NDRVA to the gate of the external N-channel FET.
14
14
V
CC
9V Linear-Regulator Output. Decouple V
CC
with a minimum 1µF ceramic capacitor to
AGND; also internally connected to the FET drivers.
15
15
IN
Power-Supply Input. IN provides power for all internal circuitry except the gate driver.
Decouple IN with 0.1µF to AGND (see the Typical Operating Circuit).
16
16
REG5
5V Linear-Regulator Output. Decouple REG5 to AGND with 0.1µF ceramic capacitor.
EP
EP
PAD
Exposed Paddle. Connect to GND.