CS51221ED16G ON Semiconductor, CS51221ED16G Datasheet - Page 6

• Manufacturer Part Number: CS51221ED16G
• Description: IC CTRLR PWM FF VOLT MODE 16SOIC
• Manufacturer: ON Semiconductor

Specifications of CS51221ED16G

• Pwm Type: Voltage Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 90%
• Voltage - Supply: 4.7 V ~ 15 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: Yes
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (3.9mm Width)
• Frequency-max: 1MHz
• Topology: Buck, Flyback, Forward
• Output Voltage: - 0.3 V to + 15 V
• Output Current: 1000 mA
• Switching Frequency: 1000 KHz
• Duty Cycle (max): 90 %
• Fall Time: 25 ns
• Mounting Style: SMD/SMT
• Rise Time: 60 ns
• Synchronous Pin: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PACKAGE PIN DESCRIPTION
Package
Pin #
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
Symbol
I
COMP
PGND
SYNC
LGND
GATE
SENSE
R
V
I
V
V
Pin
UV
OV
SET
SS
FF
V
T
REF
CC
FB
C
C
T
External power switch driver with 1.0 A peak capability. Rail to rail output occurs when the capacitive load is
between 470 pF and 10 nF.
Current sense comparator input.
Bidirectional synchronization. Locks to highest frequency.
PWM ramp.
Undervoltage protection monitor.
Overvoltage protection monitor.
Timing resistor R
Voltage at this pin sets pulse−by−pulse overcurrent threshold.
Feedback voltage input. Connected to the error amplifier inverting input.
Error amplifier output.
Charging external capacitor restricts error amplifier output voltage during the power up or fault conditions.
Logic ground.
3.3 V reference voltage output. Decoupling capacitor can be selected from 0.01 mF to 10 mF.
Logic supply voltage.
Output power stage ground.
Output power stage supply voltage.
T
and capacitor C
http://onsemi.com
T
determine oscillator frequency and maximum duty cycle, D
CS51221
6
Function
MAX
.