LTC3722EGN-2 Linear Technology, LTC3722EGN-2 Datasheet - Page 8

• Manufacturer Part Number: LTC3722EGN-2
• Description: IC CTRLR PWM VOLTAGE-MODE 24SSOP
• Manufacturer: Linear Technology

Specifications of LTC3722EGN-2

• Pwm Type: Voltage Mode, Full Bridge
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 98.5%
• Voltage - Supply: 3.8 V ~ 10.3 V
• Buck: No
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: Yes
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-SSOP
• Frequency-max: 1MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC3722-1/LTC3722-2
pin FuncTions
OUTC (Pin 19/Pin 19): 50mA Driver for High Side of the
Full Bridge Active Leg.
OUTB (Pin 20/Pin 20): 50mA Driver for Low Side of the
Full Bridge Passive Leg.
OUTA (Pin 21/Pin 21): 50mA Driver for High Side of the
Full Bridge Passive Leg.
PGND (Pin 22/Pin 22): Power Ground for the LTC3722.
The output drivers of the LTC3722 are referenced to
PGND. Connect the ceramic V
rectly to PGND.
block DiagraM

COMP
R
SS
CS
FB
LEB
6
4
7
3
5
1.2V
+
–
BLANK
10.25V = ON
–
+
V
6V = OFF
300mV
650mV
CC
650mV
V
18
UVLO
CC
AMPLIFIER
ERROR
+
–
+
–
20
M1
SHUTDOWN
CURRENT
LIMIT
(LTC3722-1/LTC3722-2)
5V
UVLO
12µA
50k
14.9k
R1
12
R2
PULSE BY PULSE
M2
CURRENT LIMIT
+
–
V
CC
REF
SYSTEM
bypass capacitor di-
UVLO
–
+
COMPENSATION
REF AND LDO
LTC3722-1 Current Mode SYNC Phase-Shift PWM
QB
Q
REF GOOD
MODULATOR
SLOPE
GOOD
FAULT
LOGIC
V
1.2V
C
V
PHASE
14
5V
REF
T
CC
/R
R
S
1 = ENABLE
0 = DISABLE
GND
OSC
C
24
23
T
GND (Pin 23/Pin 23): All circuits other than the output
drivers in the LTC3722 are referenced to GND. Use of a
ground plane is recommended but not absolutely neces-
sary.
C
Use a ±5% or better low ESR ceramic capacitor for best
results.
T
T
R
S
SYNC
(Pin 24/Pin 24): Timing Capacitor for the Oscillator.
QB
QB
1
Q
SPRG
13
DPRG
2
SBUS
10
RECTIFIER
PASSIVE
ACTIVE
DELAY
DELAY
DRIVE
LOGIC
SYNC
372212 BD01
OUTE
OUTC
OUTD
PGND
OUTA
OUTB
OUTF
ADLY
PDLY
21
20
16
15
19
17
11
22
9
372212fa