LTC3725 Datasheet, PDF (2/20 Pages) Linear Technology – Single-Switch Forward Controller and Gate Driver

LTC3725
ABSOLUTE AXI U RATI GS
(Note 1)
Power Supply (V_CC) ...................................– 0.3V to 15V
External NMOS Drive (NDRV) ....................– 0.3V to 20V
NDRV to V_CC ........................................................... – 0.3V to 5V
Soft-Start Fault, Feedback,
Frequency Set, Transformer
Inputs (SSFLT, FB/IN⁺, FS/IN^–) ..................– 0.3V to 15V
All Other Pins (V_SLMT, I_S, UVLO) .................– 0.3V to 5V
Peak Output Current <1µs (GATE) ............................. 2A
Operating Ambient Temperature Range .. – 40°C to 85°C
Operating Junction Temperature (Note 2) ............ 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
UVLO 1
SSFLT 2
NDRV 3
FB/IN⁺ 4
FS/IN^– 5
TOP VIEW
11
10 I_S
9 V_SLMT
8 V_CC
7 GATE
6 PGND
MSE PACKAGE
10-LEAD PLASTIC MSOP
T_JMAX = 125°C, θ_JA = 45°C/W, θ_JC = 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
LTC3725EMSE
LTC3725IMSE
MSE PART MARKING
LTBSV
LTBSW
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 12V, GND = PGND = 0V, T_A = 25°C, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_CC Supply, Linear Regulator and Trickle Charger Shunt Regulator
V_CCOP
Operating Voltage Range
V_CCLR
Output Voltage
Linear Regulator in Operation
I_NDRV
Current into NDRV Pin
Linear Regulator in Operation
t_r(VCC)
Rise Time of V_CC
Linear Regulator Charging (0.5V to 7.5V)
I_NDRVTO
Linear Regulator Time Out Current Threshold Primary-Side Operation
I_CC
Supply Current
V_UVLO = 1.5V, Linear Regulator in
Operation (Note 3)
7
12
15
V
8
V
0.1
1
mA
45
µs
0.27
mA
1.4
2.1
mA
I_CCM
V_CCSR
I_CCSR
Maximum Supply Current
Maximum Supply Voltage
Minimum Current into NDRV/V_CC
V_UVLO = 1.5V, Trickle Charger in Operation,
V_CC = 13.2V (Note 3)
Trickle Charger Shunt Regulator
Trickle Charger Shunt Regulator, V_CC = 15V
(Note 3)
1.7
2.5
mA
14.25 15
V
10
mA
Internal Undervoltage
V_CCUV
Internal Undervoltage Threshold
Gate Drive Undervoltage
V_CC Rising
V_CC Falling
5.3
V
4.7
V
V_GDUV
Gate Drive Undervoltage Threshold
V_CC Rising (Linear Regulator)
V_CC Rising (Trickle Charger)
V_CC Falling
● 7.2
7.4
7.7
V
● 13.1 13.4
14
V
● 6.8
7.0
7.2
V
3725f
2