LTC1148_04 Datasheet, PDF (2/20 Pages) Linear Technology – High Efficiency Synchronous Step-Down Switching Regulators

LTC1148
LTC1148-3.3/LTC1148-5
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (Pin 3)
LTC1148 and LTC1148L Series ............ 16V to – 0.3V
LTC1148HV Series ............................... 20V to – 0.3V
Continuous Output Current (Pins 1, 14) .............. 50mA
Sense Voltages (Pins 7, 8)
LTC1148HV (Adjustable Only)
V_IN ≥ 12.7V ...................................... 13V to – 0.3V
V_IN < 12.7V ......................... (V_IN + 0.3V) to – 0.3V
Operating Ambient Temperature Range ...... 0°C to 70°C
Extended Commercial and Industrial
Temperature Range ............................... – 40°C to 85°C
Junction Temperature (Note 2) ............................ 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
P-DRIVE 1
NC 2
V_IN 3
C_T 4
INTV_CC 5
I_TH 6
SENSE^– 7
14 N-DRIVE
13 NC
12 PGND
11 SGND
10 SHUTDOWN
9 V_FB*
8 SENSE⁺
N PACKAGE
14-LEAD PDIP
S PACKAGE
14-LEAD PLASTIC SO
*FIXED OUTPUT VERSIONS = NC
T_JMAX = 125°C, θ_JA = 70°C/ W (N)
T_JMAX = 125°C, θ_JA = 110°C/ W (S)
ORDER PART
NUMBER
LTC1148CN
LTC1148HVCN
LTC1148CN-3.3
LTC1148HVCN-3.3
LTC1148CN-5
LTC1148HVCN-5
LTC1148CS
LTC1148HVCS
LTC1148LCS
LTC1148CS-3.3
LTC1148HVCS-3.3
LTC1148LCS-3.3
LTC1148CS-5
LTC1148HVCS-5
LTC1148HVIS-5
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_IN = 10V, V_SHUTDOWN = 0V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V₉
Feedback Voltage (LTC1148, LTC1148L,
V_IN = 9V
LTC1148HV)
● 1.21 1.25 1.29
V
I₉
Feedback Current (LTC1148, LTC1148L,
LTC1148HV)
●
0.2 1
µA
V_OUT
∆V_OUT
I_Q
Regulated Output Voltage
V_IN = 9V
LTC1148-3.3, LTC1148HV-3.3, LTC1148L-3.3 I_LOAD = 700mA
LTC1148-5, LTC1148HV-5
I_LOAD = 700mA
Output Voltage Line Regulation
V_IN = 7V to 12V, I_LOAD = 50mA
Output Voltage Load Regulation
LTC1148-3.3, LTC1148HV-3.3, LTC1148L-3.3 5mA < I_LOAD < 2A
LTC1148-5, LTC1148HV-5
5mA < I_LOAD < 2A
Output Ripple (Burst Mode)
I_LOAD = 0A
Input DC Supply Current (Note 3)
LTC1148 Series
Normal Mode
Sleep Mode
Sleep Mode (LTC1148-5)
Shutdown
LTC1148HV Series
Normal Mode
Sleep Mode
Sleep Mode (LTC1148HV-5)
Shutdown
LTC1148L Series
Normal Mode
Sleep Mode
Shutdown
(Note 7)
4V < V_IN < 12V
4V < V_IN < 12V
6V < V_IN < 12V
V_SHUTDOWN = 2.1V, 4V < V_IN < 12V
4V < V_IN < 18V
4V < V_IN < 18V
6V < V_IN < 18V
V_SHUTDOWN = 2.1V, 4V < V_IN < 18V
3.5V < V_IN < 12V
3.5V < V_IN < 12V
V_SHUTDOWN = 2.1V, 3.5V < V_IN < 12V
● 3.23 3.33 3.43
V
● 4.90 5.05 5.20
V
– 40 0
40
mV
●
40 65
mV
●
60 100
mV
50
mV_P-P
1.6 2.1
mA
160 230
µA
160 230
µA
10 20
µA
1.6 2.3
mA
160 250
µA
160 250
µA
10 22
µA
1.6 2.1
mA
160 230
µA
10 20
µA
114835fd
2