Datasheet

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ELECTRICAL CHARACTERISTICS
TPS61150A
SLVS706 – OCTOBER 2006
VIN = 3.6V, SELx = VIN, Rset = 80k Ω , V
(IOUT)
= 15V, T
A
= –40 ° C to 85 ° C, typical values are at T
A
= 25 ° C (unless otherwise
noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
V
I
Input voltage range 2.5 6.0 V
I
Q
Operating quiescent current into VIN Device PWM switching no load 2 mA
I
SD
Shutdown current SELx = GND, T
A
= 25 ° C 1.7 1.9 µ A
SELx = GND 2.7 3
V
UVLO
Under-voltage lockout threshold VIN falling 1.65 1.8 V
V
hys
Under-voltage lockout hysterisis 70 mV
ENABLE AND SOFT START
V
(selh)
SEL logic high voltage V
I
= 2.5V to 6V 1.2 V
V
(sell)
SEL logic low voltage V
I
= 2.5V to 6V 0.4 V
R
(en)
SEL pull down resistor 300 700 k Ω
t
(off)
SEL pulse width to disable SELx high to low 40 ms
I
(ss)
IFB soft start current steps 16
t
(ss)
Soft start time step Measured as clock divider 64
t
(ss_en)
Soft start enable time Time between falling and rising of two adjacent 40 ms
SELx pulses
CURRENT FEEDBACK
V
(ISET)
ISET pin voltage 1.204 1.229 1.254 V
K
ISET
Current multipler, I
fb1
/I
set1
, I
fb2
/I
set2
ISET current = 16.7 µ A 883 920 957
ISET current = 1.2 µ A 736 920 1104
K
M
Current matching, (2 × |I
fb1
–I
fb2
|)/(I
fb1
+I
fb2
) ISET current = 16.7 µ A 0% 3%
ISET current = 1.2 µ A 0% 20%
V
(IFB)
IFB regulation voltage 300 330 360 mV
V
hys(IFB_L)
IFB low threshold hysteresis 60 mV
t
I(sink)
Current sink settle time measured from 6 µ s
SELx rising edge
(1)
I
lkg
IFB pin leakage current IFB voltage = 25V 1 µ A
POWER SWITCH AND DIODE
R
DS(ON)
N-channel MOSFET on-resistance V
IN
= V
GS
= 3.6V 0.6 0.9 Ω
I
lkg(N_NFET)
N-channel leakage current V
DS
= 25V 1 µ A
V
(F)
Power diode forward voltage Diode current = 0.7A 0.83 1.0 V
OC AND OVP
Dual output, IOUT= 15V, Duty cycle = 76% 0.75 1.0 1.25
I
L
N-Channel MOSFET current limit A
Single output , IOUT= 15V, Duty cycle = 76% 0.40 0.55 0.7
I
(IFB_MAX)
Current sink max output current IFB current = 330mV 34 mA
V
ovp
Overvoltage threshold 27 28 29 V
V
ovp_hys
Overvoltage hysteresis 550 mV
PWM AND PFM CONTROL
F
S
Oscillator frequency 1.0 1.2 1.5 MHz
D
max
Maximum duty cycle Feedback voltage = 1.0V 89% 93%
THERMAL SHUTDOWN
T
shutdown
Thermal shutdown threshold 160 ° C
T
hys
Thermal shutdown threshold hysteresis 15 ° C
(1) This specification determines the minimum on time required for PWM dimming for desirable linearity. The maximum PWM dimming
frequency can be calculated from the minimum duty cycle required in the application.
5
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